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Get the best deals for 862 heads at eBay.com. We have a great online selection at the lowest prices with Fast & Free shipping on many items! Skip to main content. ... GM LS 706 806 862 241 799 862 243 CYLINDER HEAD REBUILD SERVICE 3 BUISNESS DAY. Opens in a new window or tab. Remanufactured. $459.99. Save up to 10% when you buy more. Buy It Now.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 ...Get ready to feel the G-forces as we navigate the exhilarating terrain of power and performance. 862 LS Heads aren’t just components; they’re the driving force behind an automotive revolution, and the journey has only just begun! DIY Adventure: Installing 862 LS Heads Like a Pro. Time to get hands-on, gearheads!Received 0 Likes on 0 Posts. 862/706 vs 243. I know stock vs stock the 243 is the superior head but my engine came with 706 non crack-tec heads and I'd like to use them if I could. My question is what performs better, a stock 243 or a professionally hand ported 862/706 because for the price of 243s I could have my 706s hand ported and flowed by ...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 headsThe 862 heads are a popular choice for those looking to increase the power of their engine. These heads can provide an increase in performance by increasing the airflow to the cylinders. They are also known for their ability to improve the fuel efficiency of an engine. But, are 862 heads really worth the money and effort?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 4.8.317's would kill your compression, get the 243's. The 243 chambers will make more power than the 241's or 317's, even if flow and chamber volumes are the same. You are correct, the 317 has a bigger chamber than the 241 & 243, thus dropping compression ratio. That being said I have seen a few 5.7's with 317's, and worked quite well.The 5.3L was run once again in stock trim with a single S480 turbo. Run at a peak boost pressure of 9.6 psi, the turbocharged 5.3L produced 532 hp at 5,500 rpm and 555 lb-ft of torque at 4,700 rpm ...The L33 is an example and the its pistons are 4.8l piston, same part number BTW. All the later 5.3l's have flat tops and 243 heads. So the blocks are the same. The rods and crank are the only differneace. Use the crank and rods from the 5.3L and use 243 heads and have the 5.3L H.O. or L33 (well an iron block version at least).the 862 heads are off of a 2000 5.3 while the 706 heads are from a 2005. I am wondering in terms of flow,compression,ect I will be using them on a 5.3 . Save Share. ... I know 243 and 799 heads on 5.3 is a popular swap, but never thought about shrouding issues. Either way, still an improvment over the stock heads!One popular option for 383 strokers is aluminum heads. They offer several benefits, such as being lightweight. This results in reduced overall weight, which enhances performance. Additionally, aluminum dissipates heat well, allowing the engine to run cooler.I'm having a hard time finding a set of 243 or 799 heads, so I was considering having my 317's milled approx. 25-30 thousandths and going with an .040 head gasket to bump up the compression. ... Lets compare the heads: Casting Number 706 / 862 Head: 1999+ LR4 4.8 Litre Truck 1999+ LM4 /LM7 5.3 Litre Truck Material: Aluminimum Combustion ...It was the 243 casting, but I don't think there is a big difference in potential. It made good power for a pump gas street engine. Had 10.7/1 comp, 243/258/110 comp cam with .625" ish lift. sv intake, 243 heads ported reasonably well with 2.02" 1.56" valves 50* seats, whitener 4150 carb. Pump gas pulls were the best on tq vs av gas but same hp.But, the combustion chambers are bigger than the 5.3 heads. You need to mill the 243 heads about .020" to keep the compression ratio the same. 2004 torrid red with red interior A4 GTO (1 of 499) TR-230/236 cam/TEA ported Trick Flow 215 heads/4" CAI/100mm MAF/ported FAST 90/Kooks/Magnaflow.The 706 Vortec heads are even slightly superior to the commonly found 862 heads. The reason is that the 706 heads are SPM ... these are basically 243 heads; See All 5 Photos. Vital Specs for 706 ...The 706 & 862 heads have a 61cc combustion chamber. Most of the other LS cylinder heads have larger combustion chambers. ... Also, the port velocity on the 706/862 head is much better than the 799/243, which will help you with the small bore of the 5.3. The 706/862 respond very well to a light runner cleanup and a good multi angle valve cut. If ...Sort by: Add a Comment. J8ke_Stampede. • 1 yr. ago. There's no debate, it's been proven the 862/706 heads will make more power than the 317's. 317's and 241's are the worst factor LS heads. It's also not only because the chamber size and compression ratio either. 862/706 heads have higher velocity and better coefficient of discharge. 8.799 LS Engine Cylinder Heads are some of the most recent cylinder heads on the automotive parts market. The cylinder cast architecture is with a semi-permanent mold method. The 799 cylinder heads are in the similitude to the 2004 LS2 cylinder heads due to the triangle casting marks similarity. However, unlike the 243 heads, they do not require ...hivoltagedriver. Port and polish on a set of 243's is usually ~20hp. A set of ported 243's on your LS1 should make a sizable difference, especially with a cam. '09 PSM G8 GT w/ Premium & Sport packages. Go: Kooks 1 7/8" LTs, catless mids, Corsa, VCM OTRCAI, Rick C. AirRam intake and ported TB, tuned by me.WHAT STOCK LS HEAD MAKES THE MOST POWER? WHICH CAM SHOULD I RUN IN MY 6.0L? WHAT IS THE BEST STOCK 6.0L CAM TO USE? STOCK 6.0L UPGRADES! ARE THE …The 243 Heads are cast iron cylinder heads that have been CNC-machined to create larger intake and exhaust ports. The combustion chambers have also been machined to be smaller, which increases the compression ratio. While the 243 heads are not the newest or best option out there, they offer a great value for the price.So i just bought a set of 243 heads and i was wondering if i should run them as is or have them worked a little bit (ported,polished, shaved etc.). I'm running a 220/220 .551 112 cam and ls6 intake but i dont want the heads to flow too much... and won't these heads stock lower my c/r since they have a larger combustion chamber? I haven't really dealt much with heads and what not so any advice ...Chinese authorities are investigating Meng Hongwei, who has been missing since late September, for taking bribes. Two years ago, Meng Hongwei became the first Chinese person to hea...

PRC As-Cast 225cc LS1/LS2 Cathedral Heads - Big Chamber $ 2,203.19. PRC LS3 Aftermarket 6-Bolt 260cc CNC Cylinder Heads $ 2,709.99. PRC LS7x 265cc CNC Heads $ 3,935.99. PRC LS7x 285cc CNC Ported 400 CFM Heads $ 3,935.99. Precision Race Components Aftermarket LS3 As-Cast Cylinder Heads $ 2,101.19.See my Signature for full the mods. I have comp cam 222/224 566/568 112lsa. Yes 05 has 6.0L motor vs 5.7L. If you are just make a swap from stock 241's to stock 243's then 15-20rwhp would be a "safe" expectation..... maybe use a cometic gasket set to get the CR up a bit and the quench better for some extra power.The 799 heads will need to be milled a bit to get the compression ratio back to where it needs to be. That will determin what pushrod to go with. The stock heads should be something like 61.15 cc. The 799 heads should be 64.45. . 1994 SFBD extcab longbed 20/22 406sbc . Project thread.Which factory LS cylinder head works best with a turbo, 706 or 317? It's the age-old comparison, airflow vs compression. This LS head shoot out between the s...We find out which factory LS head works best under boost in this back-to-back test of the 706 heads vs. the 317 heads. 398ci LS, TKX, QP 9 inch, Strange pro iron case, strange 35 spline axles, Spc front upper control arms, UMI front lower control arms, Howe ball joints, upper +.5 tall, CPP C5/6 spindles, Ridetech coilovers, C5/6 brakes, C7 …

Factory has the 862 heads. I've been offered a 5.3 block with 243 heads on it for $300. Would the stock 243 heads work better on it than the 862 heads? Obviously they need to go to the machine shop to be looked over but without any alterations to the stock form, which is the better head? Engine is stock other than cold air intake.The AP220SP is the biggest 23* head All-Pro has before you get into raised runner designs. It is also standard valve spacing. Flow numbers @ 28" of water. All figures in CFM. All-Pro AP220-SP-23* --- ~$3,350 (uses standard valve train and fully CNC'd runner) Intake 219cc Exhaust.Aug 6, 2020 · The 243's have bigger valves which do better on 4.0" and larger bores. On the smaller 3.898/3.78" bores of the LS1/6 & all 5.3/4.8's the 706 are very decent. On a 4.00" bore of an LQ4 though it is splitting hairs. On the same cam, on the same engine, the heads are going to perform within +/- 5hp/5tq of each other, it is almost meaningless.…

Reader Q&A - also see RECOMMENDED ARTICLES & FAQs. See All 18 Photos. After installation of the Tra. Possible cause: DESCRIPTION Professionally rebuilt 5.3 Chevrolet / GM cylinder heads. These cylinder head.