What did 243 heads come on

What did LS 823 heads come on? While General Motors first launched the LS3 series of engines in 2008, it was initially installed in the C6 Corvette. ... While the 243 heads were initially made for C5 Corvettes from 2001 to 2006, their popularity among LS6 engine users soon expanded beyond this. These powerful engines could be found not only in ...

243 04 up LS6 aluminum center bolt 5.7 ***These castings were also used around 05 in truck applications*** 862 99 and up 4.8-5.3 Truck heads 706 99 and up 4.8-5.3 Truck heads 799 05 and up 4.8-5.3Truck heads ***reportedly came on a few corvette's too*** These are basically 243 Heads 873 99-00 LQ4 6.0 Iron center bolt headsSep 28, 2011 · I would think a 243 head is a 243 head, I think I read that the 243 was used on the LS6 Z and all LS2 motors had the 243 heads. Mr.Bill Reply Like 09-27-2011, 08:43 ...Run with the 317 heads, the modified 5.3L produced 448 hp at 6,800 rpm and 398 lb-ft of torque at 5,000 rpm. After installation of the 706 heads, the power jumped to 468 hp at 6,800 rpm and 413 lb ...We would like to show you a description here but the site won’t allow us.Equipped with the 317 heads, the turbo 6.2L produced 807 hp at 6,800 rpm and 747 lb-ft of torque at 4,900 rpm. The boost pressure peaked at 7.6 psi, before dropping to 6.9 psi at 7,000 rpm. The ...Once you receive the new ported heads, just send us your OEM heads for the core refund. Available options: (Porting Service) GPI - LS1 Cylinder Head Porting Service. $ 1,095.00. (Purchase Outright) GPI - LS1 Cylinder Head Porting Service + OEM LS1 Cylinder Head Set Core. $ 1,795.00. Your selection:

706 heads are very affordable. 706 heads are plentiful and easy to find. 706 heads have smaller chambers, so you don't lose compression. 706 heads are slightly superior to 862 heads due to how ...If the heads are 243's and are stock on a 6.0L engine, you are looking at an LS2. The 243's also came on LS6 engines, but are 5.7L engines. If you are actually wondering which engine came out of the Avalanche and it has 243 heads, you are looking at a 5.3L with some other than stock heads. They didn't install the 243 heads on the truck engines.1713 posts · Joined 2004. #10 · Jul 28, 2020 (Edited) I have stage III ported (243) LS6 Heads/cam, Fast 102lsxr, 105mmTB, 100MAF, etc. I at at 437rwhp since last tune, since then have added 1 piece CF driveshaft, forged rims, etc. Here is an idle clip of mine, not sure this sounds crappy.243 04 up LS6 aluminum center bolt 5.7 ***These castings were also used around 05 in truck applications*** 862 99 and up 4.8-5.3 Truck heads 706 99 and up 4.8-5.3 Truck heads 799 05 and up 4.8-5.3Truck heads ***reportedly came on a few corvette's too*** These are basically 243 Heads 873 99-00 LQ4 6.0 Iron center bolt headsAdd a fast intake and another 10-15. N/a as you prolly know doesn't yield a lot of hp per $. I agree. I had a small Crane cam in mine and then added Dart 205 heads that were as cast. They were roughly equivalent to the 243's and I picked up 20 hp with just the head swap.LS1 with 862 heads. I may have found an LS1 shortblock I can drop in my truck but I want to know if I can use the 862 heads from my 4.8 on the LS1. Also, what will the CR be if I use the 862's on the LS1. Thanks in advance. It will bump your CR up a hair, 4.8/5.3 heads and LS1 heads flow the same, the only difference is the combustion chamber.All cultural and arts activities in Iran will be suspended for seven days following the death of President Ebrahim Raisi, the Ministry of Culture announced on Monday. …

Mar 26, 2012 · From how I understand it to work...and I'm no expert... 317 heads are designed for a 4.000" bore motor. Your LS1 is a 3.900" bore motor. Therefore, you'll need a thicker gasket on your heads. Stock heads are 67cc and you are going to a 72cc. This is going to drop your stock 10.5:1 compression down some.The cylinder heads are designed with aluminum materials with a 61cc combustion chamber volume. They also come with a cathedral-shaped intake port and an oval exhaust port. The 826 cylinder heads on LM7 have an intake runner volume of 200cc, exhaust runner volume of 70cc, 1.890 in. intake valve diameter, and 1.550 in. exhaust valve diameter.But these heads also saw duty on some 1962 and 1963 full-size Chevy passenger cars with the 300 hp 327. Those produced in the Tonawanda plant were exclusively used on those bigger cars. Flint heads saw duty on both full-sizers and Corvettes. The heads are quite easy to identify, as they sport an “X” underneath the #1 or #8 exhaust runner.BARE GM LS 243 HEAD - 4.8L, 5.3L & 6.0L. Generation III V8 cathedral intake port cylinder head. Casting 12564243. For truck, van, SUV and perfomance applications. Used on LS6, L33, L20, LH6, LY5, LMG, LC9,LS4, LH8, LS2, LFA, LZ1 engines. Generation III cylinder head for V8 truck, van, SUV and perfomance applications often called an LS6 head. It ...The 243 vs. The 799 Cylinder Head. As you have most likely caught on by now, these two cylinder heads are practically the same. The main difference between the 243 and 799 cylinder heads is that the 243 was used on older engines from GM Research, while the 799 has been used on newer engines from multiple manufacturers.The intake manifold is the most important element in swapping from a cathedral to a rectangular port head. To match the runners, this factory LS3 (PN 12610434) or an L76 manifold are the most popular. It is important to note that there are some minor differences between the L76 and LS3 intakes, such as a screw-in MAP sensor instead of the Gen ...

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799 vs 243 heads. Looks lke they came across a bunch of them as they are listing on ebay also. After searching today seems like a truckload became available all of the sudden. From what I can find on the truck forums these are the same as 243 heads without hollow valves or sodium filled I think it was.The 317 heads featured ports that all but duplicated the LS2 243 heads, meaning they were cream of the cathedral-port crop in terms of airflow. The 317s did differ from the 243s in that they featured much larger (and less efficient) combustion chambers. Where the stock 243 heads featured 65cc chambers, the 317 heads featured 72 cc …Mar 9, 2021 · I have a 2004 vz ss ls1 6sp man, the engine has the 241 heads on it and I was wondering if the 243 heads would fit, if so what do I need and is it worth the upgrade. Car is currently making 253.5 RWKW what kind of gains would I be looking at. From memory yes they will fit but gains are not too much.It's a 2004 A4 LS1. Lots of good info here. I can't seem to find much on these 843 heads except they're older than what comes with my car. A friend of a friend is looking to sell them to me for $1000. He said they're used off an older corvette, cnc'd on intake exhaust and combustion chambers, new stock valves with 3 angle valve job, ls6 yellow ...431 posts · Joined 2019. #9 · Jan 5, 2021. 706 heads out perform all others on a 4.8. Throughout the entire normal rpm range. It's not all just about flow. Those larger flow numbers from other heads are misleading. Yes they flow more than 706 however, only beyond 6000rpm. 706 heads are the best for the 4.8.

The 243 head came on the more powerful LS6 engine from 2001 to 2006, and was used in C5 Corvettes. Later engines like the truck-spec LQ9 and LQ4 used the …1518 posts · Joined 2009. #7 · May 3, 2010. I just got my quote from AI for their full 226cc CNC work and the price can not be beat. With shipping back from them the price is just a bit over $1,000. They also have a budget pricing port job as well but yields about 10rwhp lower.Mar 23, 2014 · But, outside of that I figured that lightly messaging the heads and the addition of an appropriate aftermarket camshaft (about 220/230 duration with .570-.585 lift and a 114 lsa) would put me in the ball park. Now, the owner of the heads I bought said they did not have the sodium filled valves we've come to expect from other 243 heads.The 243 heads are factory cylinder heads that were used on the LS6 engine found in the 2001-2004 Chevrolet Corvette Z06. They are made of aluminum and have a small combustion chamber, which can result in high compression ratios.87LC2. This is rarely brought up, but the combustion chamber design of the L92/Ls3 heads is superior to the 241/243 chambers. The cathedral heads use a "heart" shaped chamber where the square port heads use a "butterfly" shape. The butterfly design is said to improve tumble, swirl, flow, flame propagation, everything.Feb 18, 2024 · 706 heads tend to be more popular than 243 heads with those who run naturally aspirated engines. While they don’t have the same size combustion chamber they also don’t have the tendency to lower the compression ratio and reduce horsepower. When looking to replace your heads, they offer a high degree of consistency since they are ...Jul 9, 2012 · Designed specifically for a rectangular-port head application (which likely did not favor either of the cathedral-port heads), the 289LRR grind featured 0.624 lift, a (wide) 239/255-degree ...The L33 is a 5.3L, Gen. 3 small block engine used in GM trucks between 2005 and 2007. Although it is a truck engine, it used cylinder heads closely related to the LS2 and LS6. The engine came with flat-top pistons for increased compression, and has a unique camshaft. For marketing purposes, it was known as the Vortec 5300 H.O.The 2007 year had three 5.3L motors offered. The 2007 Classic (still a NBS) had the 5.3L with either the L59 (flexfuel version) or the LM7. The 862/706s are on the 99 and up 4.8/5.3L motors. The only difference about the L59 motor was the injectors. 2005 and up motors had the factory electric fans and electric TB.Texas Speed has ported 5.3 heads for a reasonable price if you want more flow. If the heads are 706 castings, chances are that they are cracked. You can improve performance with 243 heads, but you will need to mill them to maintain compression. Your best bet is to just get some 862s and have some work done to them.Before I get into the the meat of the book—the spec charts—there are a few things you need to know. They include information on converting from a cathedral port to a rectangular port, some thoughts on the merits of cathedral versus rectangular ports, and a bit of cylinder head theory. The intake manifold is the most important element in swapping from a cathedral to a rectangular port head ...

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706 Heads on a 06 5.3. Jump to Latest Follow. 16K views 9 replies 6 participants last post by LiftedLQ9 Nov 12, 2008. B. Biggsw784 Discussion starter. 246 posts · Joined 2006. #1 · Nov 10, 2008. I am pulling the heads off my 5.3 to replace the lifters due to one of them collipsing. While I have these heads off, I was going to get them milled ...We may earn a commission for products purchased through links on this pageAug 3, 2022 · 823 vs 243 heads The popular L6 243 heads have a smaller capacity (64cc), whereas the 823’s larger intake valve has a 70cc cylinder, promoting better overall flow within the combustion chamber. In addition, there’s some controversy among gearheads about whether the “swirl” ramp added to the 243 to improve fuel and air mix in the ...C5 Tech - Need some input on Patriot stg 2 243 heads - Im looking at a set of low milage, used Patriot stg 2 243 heads milled to 59cc with the Patriot 650 dual springs. My car is a 2003 Z06 with long tubes, fast 90/90 and a comp cam 230/232 592/595 111 lsa. I realize that AFRs and Trick Flow heads are probably far...The LQ4 is a 6.0L LS (Gen. 3) small block engine used in GM trucks between 1999 and 2007. For marketing purposes, it was also known as the Vortec 6000. The engine specs and information listed here is for the stock LQ4 engine. Mechanically similar, General Motors’ LS and LS-based Vortec engines wound up on almost every branch of the GM …Takaba certainly did not want to let go of his partner, Kenjaku, and the comedy act to come to an end. However, he realized that, just like a star, he had now reached his brightest point before ...LT engines were producing an output of 275 horsepower, and its successor, LS1 243 heads came with a whopping power of 345 horsepower. ... LS1 engines come with reduced proportions, and this makes it much easier to swap into vehicles even with a small engine base. They get this compact size due to the old-school pushrod design that is distinct ...Item description from the seller. GM LS2 LS6 Gen III Gen IV Cylinder Head 243 Assembly Set OEM. These heads must be resurfaced before installation. Machine cleaned and inspected for cracks and damage before shipment. Heads may have been previously remanufacture / resurfaced. Valves may be oversized. Additional Details: Genuine OEM.5592 posts · Joined 2006. #4 · Jan 30, 2012. Mike, The 492 is an over the counter head, the ones I have and have had are angle plug. The 186 seems to have been the head of choice on 302's in 1969...I have seen them with 1.94 IV so they came on other engines too. 1968 Camaro NHRA/IHRA SS/C 'Super Stocker' 396/Jerico.Chevy Cylinder Head LS1/LS6 243/799 - PAIR, Year:97-04. NEW CNC Ported LS1/LS6 Cylinder Heads .650 Springs 2.02/1.59 Valves PAIR. CNC Ported LS1/LS6 243/799 Cylinder Heads .650 Springs 2.02/1.59 Valves PAIR. Check out Our Other Articles: Everything You Need to Know about LS3 Heads. 823 Heads – Everything You Should Know About. All About 243 ...

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The Gen III block can be iron or aluminum, and you will see 4.8/5.3L cast into the front of the block. Both the 4.8L and 5.3L have the same bore yet different strokes. The 4.8L has a 3.27-inch ...On our Mast heads, the LS3 head offered both more intake and exhaust flow than the cathedral-port heads, resulting in an intake-to-exhaust flow percentage (372/261 cfm) of 69.89 (meaning the ...SW LTs, SW Cat Back, HPE S-Cam, 243 Heads, Patriot Golds, HPE Tuned, Z06 Maf, ASP Pulley, K&N CAI, MTI TB, Bird of Prey Clutch, GMM Ripshift, AMW Catch Can, Harrop Diff Cover, Pedders Subframe Bushings, NGK TR6, MSD Wires, SLP 160 T Stat, RP Trans/Diff Fluids, Mobil 1 10-30, Dual Areoforce Gauges/Banshee Pod. ... Come discuss mods, horsepower ...741 posts · Joined 2004. #11 · Jul 12, 2022. If you want to make power with a 5.3, you need compression or boost. The 799/243 head is great for flow, but given that your engine originally came with 706 heads, it likely has dished pistons. The 799/243 will kill what little compression you have now unless you mill them.Jul 9, 2012 · Designed specifically for a rectangular-port head application (which likely did not favor either of the cathedral-port heads), the 289LRR grind featured 0.624 lift, a (wide) 239/255-degree ...The LC9 engine is a 5.3L, Gen. 4, aluminum small block engine used in GM trucks and SUVs between 2007-2011. For marketing purposes, it was also known as the Vortec 5300. The engine specs and information listed here is for a stock LC9 engine. Mechanically similar, General Motors’ LS and LS-based Vortec engines wound up on almost every branch ...You don't need it at 500hp. A 1-7/8" tube typically runs out of room at around 1khp. Your fine. As mentioned, the gains seen from porting won't be huge. The reason is everything is already working pretty darn good as is. It would take a few more radical steps to move north on power.WNY. Dec 23, 2016. #2. I'm no expert on this but, 07 on 5.3's had the 243 heads and from what I read they are the most desirable.The 243 and 799 heads are pretty much the same, dismantlers claim that they often find one of each on the same factory truck engine. You might want to do some research into the 243. ….

Jul 9, 2012 · Designed specifically for a rectangular-port head application (which likely did not favor either of the cathedral-port heads), the 289LRR grind featured 0.624 lift, a (wide) 239/255-degree ...I did some extentsive searching for on 305 vortec heads and found little info.You want heads with a small combustion chamber to keep the compression up,the typical 350 head cc is too large.Can't confrim this but I did read that the 305 vortec didn't flow as well as the 350 vortecs but do have smaller cc's and is probably the best production head for a 305 and the 1.84 intake 305 are probably ...Find Parts and Accessories 243 ls heads KEYWORD and get Free Shipping on Orders Over $109 at Summit Racing! Use your Summit Racing SpeedCard today, and get up to 10% back - Get Details! ... 243/257 dur @.050", .689"/.672" lift, 108.5 deg LSA. Part Number: CXM-03-08-0098. Not Yet Reviewed. Estimated Ship Date: May 23, 2024 if ordered today. Free ...Chevrolet LS rectangle port heads need at least 4.00 bore. 5.3 and 4.8 are 3.78". LS7 heads require even larger. All 4.8s, 5.3s, and 5.7s came with cathedral port heads. Like mentioned, the square port heads were not put on any engine with a bore smaller than 4".Jan 6, 2009 · To 2007 head issues #243 vs. #799. C6 Tech/Performance - 2007 head issues #243 vs. #799 - I read a thread not long ago on C6 general about a difference in the heads on the born in Oct. 06 C6's that GM used, they used #799 heads as opposed to #243 heads. The person who wrote the thread said his numbers on the dyno where …DESCRIPTION Professionally rebuilt 5.3 Chevrolet / GM cylinder heads. These cylinder head's casting numbers are: 243 ONLY! THESE HEADS ARE THE SOUGHT AFTER 243 CASTING NUMBERS ONLY THIS IS FOR A PAIR HEADS! DETAILS Heads are thoroughly cleaned and inspected Pressure tested to ensure no cracks or leaks Guide work performed / replaced with new guides as necessary Valve job / performed on Serdi ...Im selling a set of 243 heads off my 05 GTO. they have about 20K miles on it, and about 5K on the springs. they have a dual spring kit (i cant remember the name of the maker), but they have ti retainers, new locks, seats and seals. SOLDChevy 706 LS Heads are high-performing cylinder heads that offer enormous power at an incredible price. They are the most affordable and most effective remanufactured cylinder heads that can be used for a 4.8L, 5.3L, and even 6.0L LS engine build. Their thin cross-section depicts a high-velocity and smaller-volume runner design with an ...The LY5 engine is a 5.3L Gen. IV iron-block engine used in GM trucks and SUVs between 2007 and 2009. For marketing purposes, it was also known as the Vortec 5300. The information listed here is for a stock LY5 engine. Mechanically similar, General Motors' LS and LS-based Vortec engines wound up on almost every branch of the GM family tree ...According to the internet, some of the best cathedral port LS heads available have a 243 casting code, and would have originally come on 2001 or newer LS2 and LS6 engines. They have larger intake and exhaust runners and a smaller chamber, meaning more compression and better airflow. The LS6 heads even have fancy hollow-stem … What did 243 heads come on, 1232 posts · Joined 2010. #2 · Jun 29, 2010. The originals from the 60's and early 70's didn't have the bowtie, but I believe the later ones did. Not sure on that. Those heads were on the L78 396's in Nova's, Camaro's, Chevelles, etc. and the ZL1, L88 and L89 427 in Corvettes. Yes these were fairly rare from the factory., The L76 is a 6.0L, Gen. 4, aluminum small block engine used in both GM cars and trucks from 2007 to 2009. This article is dedicated specifically to the truck and SUV version of the L76 engine. (NOTE: Don't confuse the engine specs here with the L-76 5.4L small block which could be found in the C2 Sting Ray Corvette in 1964.), If you are asking, “What did 243 heads come on?” The 243 heads were typically found in GM’s C5 Corvette; however, it was later ported and now found on engines like truck specs LQ4 and LQ9. The LS6 was designed to work with the Corvette’s titanium exhaust system in order to deliver extra power., These large-runner heads have a 12-degree valve angle, like stock, and are compatible with factory LS7 rocker arms and stands. The heads can accommodate 1.625-inch-diameter springs, and several are available. A 4.125-inch-or-larger bore is required. Base price is $1,130 each, fully assembled, through Summit Racing., The valves on LS3 heads are designed to be larger than those on stock LS heads to improve airflow, leading to increased power output. Standard valve sizes for LS3 heads include 2.165 inches (intake) and 1.590 inches (exhaust). However, it's not uncommon for LS3 heads to feature even larger valves. For example, some aftermarket LS3 heads may ..., Ever scratch your head when you're frustrated or thinking? HowStuffWorks found out how this tic became the signal for so many social expressions. Advertisement If you've ever had ..., Last updated on 05/06/2024. The LC9 engine is a 5.3L, Gen. 4, aluminum small block engine used in GM trucks and SUVs between 2007-2011. For marketing purposes, it was also known as the Vortec 5300. The engine specs and information listed here is for a stock LC9 engine. Mechanically similar, General Motors’ LS and LS-based …, Stock heads with Brian Tooley top end kit installed by PCMOFNC. 2008 Heads had 60k at install and 64k when removed for my LSX head swap this year. Perfectly fine. I can give you my personal info and you can verify with Kelly. 450 OBO plus shipping and PayPal fees. Sent from my SM-G935T using Tapatalk., 799 05 and up 4.8-5.3Truck heads ***reportedly came on a few corvette's too*** These are basically 243 Heads. 873 99-00 LQ4 6.0 Iron center bolt heads. 317 01 and up LQ4 and LQ9 6.0 aluminum center bolt heads. 035 01 - 04 LQ9 6.0 aluminum center bolt heads. Even more detailed info: Casting Numbers 241, 806, 853., We may earn a commission for products purchased through links on this page, Chevy Cylinder Head LS1/LS6 243/799 - PAIR, Year:97-04. NEW CNC Ported LS1/LS6 Cylinder Heads .650 Springs 2.02/1.59 Valves PAIR. CNC Ported LS1/LS6 243/799 Cylinder Heads .650 Springs 2.02/1.59 Valves PAIR. Check out Our Other Articles: Everything You Need to Know about LS3 Heads. 823 Heads – Everything You Should …, 78 posts · Joined 2009. #11 · Jul 19, 2010. The 2 popular heads are 243 &799 heads for the ls1.Either head will add about10- 20hp to the wheels. mods=stock 243s,85mm typhoon intake&tb,pacesetters&catless mids,85mm ls2 maf,svede otr,predator 224/231 cam,42# inj. and aComplete Street Performance dyno tune= 415/386., The LQ4 is a 6.0L LS (Gen. 3) small block engine used in GM trucks between 1999 and 2007. For marketing purposes, it was also known as the Vortec 6000. The engine specs and information listed here is for the stock LQ4 engine. Mechanically similar, General Motors’ LS and LS-based Vortec engines wound up on almost every branch of the GM family ..., Pontiac 1973-1974 Cylinder Heads. No "H" stamp on early 1973 heads. May 7, 1973 is the head assembly date, NOT the casting date. Heads with casting dates starting around mid-March 1973 to mid-April 1973usually will have screw-in studs. Combustion chamber depth measured from quench side. Stud Boss Type refers to casting design around rocker arm ..., chevymastermind said: I have a set of Chevy heads with a casting number of 333882, with 1.94 Heads, i am hoping to make 350-375HP with them. the engine is a 350 Steel crank, 4 bolt main, 9.5:1 compression ratio with these heads, comp cams .480/.480 lift with 230/230 Duration at 0.50, 600cfm edelbrock carb, Performer RPM intake, headers with ..., ddawson. 15570 posts · Joined 2004. #4 · Sep 29, 2008. The 317 is a 243 but with a larger CC. I have the 317 on my car with 70CC. 1969 Corvette, 427 Convertible. 496CI Edelbrock Heads, Quickfuel Carb, LS6 Intake. Straub Technologies 229/235 .590/.559 107, Hedman Headers, Magnaflow Exhaust. Speed Direct Rack and Pinion, …, Dec 22, 2010 · 821/823 castings. im going to order ls3 heads but i would like to know the difference between 821/823 castings,i thought i read somewhere they were cast using a different process or something to that effect ,so which is better ls3 or l92 or is there no difference besides the map sensor. IBM 04/A4, #243 heads, Mild Blower cam by Comp …, The cost? Too much for the bang. If I didn't care about maintaining a stock-looking engine bay (painfully stock), I would go with AFR heads. Stock LS6:243 heads aren't worth purchasing (new) - IMHO. You CAN find stock LS2:243 heads in new condition for a very low price (~$600/pair). The difference is in the valves (LS6 valves are …, I've been planning to upgrade my heads for about a year. A month ago I ordered a new set of bare 243/799 heads. Then I ordered new valves, springs &hardware, 1.8 rockers, pushrods, ARP bolts, and gaskets. I've lapped in the valves and assembled the hardware. I'm ready to switch them out. Has..., The newer heads were 317 or 035 casting numbers, which featured larger valves like the 799 and 243 heads, but also larger combustion chambers, which means the static compression ratio will be lower unless the heads are milled to increase the compression ratio. This makes these heads slightly less desirable than the 243/799 heads., 3012 posts · Joined 2008. #1 · Apr 14, 2012. I have a 2004 Aluminum 5.3 with 70k miles that has 862 heads on it. I also have a set of 243 heads off of a 2009 Aluminum 5.3. Which heads should I use? I've been told the 243's flow better and the 862's supposedly raise compression .5 a point., What did the 601's come on? Save Share. ... Better heads would be any of the 305 H.O. varieties that RB69SS396Conv mentions. (Basically, the heads that were used on the High Output 305's) Stock, they all have the "small-ish" 1.84 intake valves, and ~150-160cc intake runners. -601's have ~55cc chambers, -416 and -081 heads have ~58cc chambers., You don't need it at 500hp. A 1-7/8" tube typically runs out of room at around 1khp. Your fine. As mentioned, the gains seen from porting won't be huge. The reason is everything is already working pretty darn good as is. It would take a few more radical steps to move north on power., Auto Parts Blog. 243 heads: 243 heads specs that make it special. By TheAutoly Team. 243 heads. Last updated on September 6th, 2023 at 04:12 am. …, The ls6 heads would be 243 heads some were sodium filled vales some standard valves depending on what car they came on. the 799 casting head is the same as the 243 and came on some motors a 243 on one side and a 799 on the other. ... If they do then it would have come off of a 02-04 z06 which have lighter intake valves as well and usually run a ..., C5 General - LS 6 Intake Manifolds and 243 Heads - Thinking about putting 243 heads on my 5.3 motor in my truck. Want to know if the LS6 intake manifold benefit me over the truck manifold. ... Forgot to ask, what car did they come off of? 243 heads are used in a couple applications.. if they are stock springs you may want to swap them for new ..., The LS 243 Cathedral Port cylinder heads are renowned for their exceptional performance capabilities over the other cathedral port offerings. These heads are designed to maximize airflow and combustion efficiency, taking advantage of the LS6 engine's power potential. With their cathedral port design, larger valves, and improved airflow ..., What did LS 243 heads come on? The 243 head came on the more powerful LS6 engine from 2001 to 2006, and was used in C5 Corvettes. Later engines like the truck-spec LQ9 and LQ4 used the exact same port design as the LS6's 243 heads, but had 6 cc larger combustion chambers., Chevy 706 LS Heads are high-performing cylinder heads that offer enormous power at an incredible price. They are the most affordable and most effective remanufactured cylinder heads that can be used for a 4.8L, 5.3L, and even 6.0L LS engine build. Their thin cross-section depicts a high-velocity and smaller-volume runner design with an ..., The L33 is a 5.3L, Gen. 3 small block engine used in GM trucks between 2005 and 2007. Although it is a truck engine, it used cylinder heads closely related to the LS2 and LS6. The engine came with flat-top pistons for increased compression, and has a unique camshaft. For marketing purposes, it was known as the Vortec 5300 H.O., Which LS engines have 243 heads? The LS6 engines from 2001-2006 have 243 heads. The LS motor with 243 heads is more powerful and efficient. GM’s 243 heads were typically found in C5 Corvette and later on engines like truck specs LQ4 and LQ9. How much Horsepower (HP) is added by 243 heads? … See more, These large-runner heads have a 12-degree valve angle, like stock, and are compatible with factory LS7 rocker arms and stands. The heads can accommodate 1.625-inch-diameter springs, and several are available. A 4.125-inch-or-larger bore is required. Base price is $1,130 each, fully assembled, through Summit Racing., I'm always for more cubes. But, if the 5.3 is solid otherwise, and you don't need the little extra power and/or don't wanna spend the money for the 6.0 swap, then fix the 5.3. You can do small easy things to the 5.3 to match or exceed the 6.0's power and maybe still come out cheaper, depending on the cost and condition of the 6.0 in question.