Chevrolet Performance LSX-LS7 CNC-Ported Bare Cylinder Head. LSX-LS7 CNC-Ported Cylinder Head. 270cc Intake Port / 85cc Exhaust Port. 70cc Combustion Chamber. Bare, Sold Individually. View Details. $1,267.99. Ships on 06/21/24. FREE Shipping.The LS1 heads have 67cc chambers with 2.00/1.55-inch valves. Other heads you'll run into are 852 and 706 castings, which have smaller 61cc chambers and 1.89/1.55-inch valves. These are best for ...Fits. The price listed is for you sending your cathedral port cylinder heads (4.8/5.3, LS1, LS6, LS2, LQ4/9) to us for porting. Our stage 1 porting service will include the re-use of the stock vales. Stage 2.5 will include aftermarket 2.02/1.57 stainless steel valves. We also offer valve spring upgrades. PRC CNC Porting/Machining Service Includes:933: Found on 1997 LS1 engines up to mid-September. Although 862 and 706 heads share many similarities, the primary difference is that the 706 heads are made using SPM (semi-permanent mold) while the 862 heads are not. This makes the 706 heads slightly superior. Cylinder Head.Summit Racing™ Precision Cast Cylinder Head SUM-162LS210CATH. Chevy LS Cylinder head, 210cc Cathedral port Intake Runner, 64cc Chamber, 2.02 Intake Valve 1.6 Exhaust Valve, 3.898+ bore sizes, Max .600 Lift Ea. Part Number: SUM-162LS210CATH. ( 1 ) Estimated Ship Date: Today.The LQ9 is a 6.0L Gen. 3 small block engine used in GM trucks between 2002 and 2007. For marketing purposes, it was also known as the Vortec HO 6000 or VortecMAX. The information listed here is for the stock engine. Mechanically similar, General Motors’ LS and LS-based Vortec engines wound up on almost every branch of …It has a bore & stroke ratio of 3.78" x 3.62", 9:1 compression ratio and delivers 345 horsepower at 5200 rpm along with 380 foot pounds of torque at 4000 rpm when equipped with the optional factory ram air induction system or 310 horsepower at 5200 rpm with 375 foot pounds of torque at 4000 rpm without it.IIRC, only the very first LQ4s from the 2000s era had cast iron 317 heads. General consensus is the 706/862's flow well enough to support over 450hp NA. A good street cam and TBSS intake should get you close to 450, but you're going to …The LH6 engine is a 5.3L Gen. IV aluminum engine that replaced the LM4 in 2005. It was the first Gen. IV LS truck engine and offered Active Fuel Management (AFM). The LH6 was available in mid-size SUVs until 2009, and in GM pickups from 2007-09. For marketing purposes, it was also known as the Vortec 5300.Add 100+ horsepower to your GM LS or Gen 5 LT engine with a Texas Speed & Performance cylinder heads and camshaft package! Our packages will include cathedral port, square port, and rectangular port cylinder heads to accommodate LS1, LS2, LS3, L99, LS6, LS7, LSA, LQ4, LQ9, L83, L86, LT1, and more! All packages will include a pair of …ProMaxx Performance. HEAD LS 706/862 ASSM. Part Number: 723-LS706N. Product Q&A. View Now. $532.86. Lowest Price Guarantee. See more product details. Free Shipping - Estimated to ship direct from manufacturer on 03/25/24 , pending manufacturer availability.LSXceleration Stainless Steel 8mm x 2.000 LS Intake Valve Set 15-22000-8 Stainless Steel LS Valves 2.165" Head x 8mm Stem x 4.870" OAL x 0.160" Tip x 45 degree seat angle Features: Hardened Stem Tip Chrome Plated Stem Fully Machined Surface Swirl... 15-22165-8 $96.00 Add to Cart Compare. Add to Cart Compare. Dart Stainless Steel GM LS 2.165 ...If so, the 862 has a tiny 1.9 intake valve. The 317 head has 2.0 valve and a larger intake runner cc, like the LS6. The 862 in a good bench make 220ish cfm, 317s as much as 257 or so. Just has a larger combustion chamber.This is a Rebuilt OE Stock LS 4.8L , 5.3L Cylinder Head Assembly. Part # : 706 , 862 also fits Description : Stock LS Series 4.8L / 5.3L Cylinder Head. Compatible with LR4 / LM7 / LM4 Engines. Specs : Combustion Chamber Volume: 61.15cc Intake Port Volume: 200cc Exhaust Port Volume: 70cc Intake Valve Diameter: 1.89 inches Exhaust Valve Diameter: 1.55 inches ...Each CNC ported cylinder head will have the exact same port and chamber configuration as the original master used to develop the CNC program. ACCOUNT CONTACT MY CART. EVENTS ; Gift Cards & e-Gift Certificates ; Lingenfelter ... Lingenfelter GT11 LS Series Camshaft 371/215 379 231 R118. $424.95. GM LS1 LS6 Head Gasket & Bolt Kit 1997 03 …The combustion chamber diameters can play a big role in hindering flow and performance. The 706/862 combustion chamber diameter measures out at around 3.670" and the 243/799 combustion chamber messages out at around 3.880" and giving the fact that the LM7 5.3L engine bore is 3.780" this more than likely has something to do with the power loss ...The 5.7L LS1 is the original Gen. 3 small block engine from General Motors used in cars from 1997-2004. The LS1 engine specs and information here is for the stock 5.7L LS1 engine. Mechanically similar, GM’s LS and LS-based Vortec engines wound up on almost every branch of the GM family tree: Chevy, Pontiac, GMC, Cadillac, Buick—heck, even ...Well I found this while looking for the torque specs for LS3-L92 heads. Its a complete list of all the torque specs for Gen IV 6.2L engines. Seems to be straight off the service manual for Gen IV motors, specifically Corvettes, LS3/7. Got it from Pace Performance so credit to them. Hope it helps and saves some search time. -NateP&P 706 casting heads. I'm currently working on porting the heads off of my 05 5.3. I'm still working on porting and gasket matching the exhaust side at the moment but I'm wondering how much material can I remove safely. I know on the intake side, there is a hump just past the tall intake ports and it looks like that is where the rocker stud ...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 ...Great cylinder-head airflow has been a key enabler of the LS-Series’ exceptional performance. Chevrolet Performance delivers those power-building attributes to you with a range of production-style aluminum heads — from the LS6 heads for smaller-displacement engines to LS7 style heads for 427-inch-and-larger combinations, our aluminum heads benefit from Chevrolet Performance’s extensive ...Cylinder Head, GenX® 215, CNC Competition Ported, Assembled, 64cc CNC Chambers, Ti Retainers, GM LS1, Each See More Specifications ... Trick Flow® GenX® 215 Cylinder Heads for GM LS1 TFS-3061T001-C01 TFS-3061T001-C01. Part Number: TFS-3061T001-C01. Estimated Ship Date: Aug 22, 2024. $1,330.99. Overview. Applications. Recommended Parts ...Why Is 862 Heads A Better Choice Than 706 Heads? Sand-casted 862 heads have proved to be better than others. They perform well, even with smaller exhaust valves ranging from 1.8 to 2.0 intake runners. 862 heads also possess small combustion chambers that increase the overall compression ratio provided by the 862 LS heads in cars like Chevy.Intro to L59 Engines. Meet the hidden gem that helped start the LS-swap craze. The L59 (along with the LM7) is a Gen. III, 5.3L iron block truck engine you can pick up in wrecking yards for about $600. The engine was introduced in 2002 and received a 10 horsepower bump to 295 in 2004 and was made through 2007.CHEVY SILVERADO 4.8L REBUILT CYLINDER HEAD 706 & 862 CASTING ONLY. $225.00. Casting #. This listing is for a rebuilt GM 4.8 liter V-8 cylinder head. These heads come on GMC and Chevrolet trucks and SUV's. For other models see our store listings. This head is completely rebuilt. It has been pressure checked for cracks and resurfaced. Guides and ...May 17, 2018 · The LM4 is a 5.3L, Gen. 3 small block engine used in GM trucks between 2003 and 2005. It’s is very similar to the LM7, except that it’s built on an aluminum block, and the LM7 is an iron-block engine. For marketing purposes, the LM4—like the LM7—was also known as the Vortec 5300.741 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.Professional porting and machining of combustion chambers required. No seats or guide machining. C5R rectangle-port design – requires aftermarket rectangle-port intake manifolds. Designed for big-bore (4.100" min) …Valve Spring Guide. The LS6 springs, Comp 787-16 retainers and 648-16 locks (or stock locks) will work for a budget set up on a stock cam and 1.6 rocker upgrade. Stock spring locators will work (on alu heads). Set up @ 1.750-1.730, these will work fine on a stock cam. If using an aftermarket cam I would get the Comp 26918-16 or PAC 1218 bee ...Run on the dyno first with the factory LQ4 cam, the 6.2L L92 produced peak numbers of 445 hp at 5,600 rpm and 459 ft.-lbs. of torque at 4,600 rpm. (Image/Richard Holdener) The Summit Pro LS Stage 4 (SUM-8711) cam offered a .625/.605 lift split, a 234/247-degree duration split and 113+3.5 LSA. (Image/Richard Holdener)It was produced from 2007 to 2009. This was still an iron block, aluminum headed engine. The LY2 is an excellent engine! Because it's a Gen 4, it has stronger rods and a beefier bottom end than the earlier LR4 4.8L engines. It also came with the 799 heads which flow better and have bigger valves than older 706/862 heads.ALL Gen III heads are inter-changeble. However, they need to be matched up with the proper engine combo to see any gains. Here is a list of a known production casting #'s: 933 97 aluminum perimeter bolt 5.7 806 97-98 aluminum perimeter bolt 5.7 853 99-00 aluminum center bolt 5.7 241 01-03 aluminum center bolt 5.7 (some late MY00 cars got 241 ...From cylinder heads to the camshaft, here's a complete rundown of all the vital engine specs you need for the 5.3L LM4 Vortec LS engine. ... LM4 Cylinder Head Specs; Casting Numbers: 862, 706: Material: Aluminum: Combustion Chamber Volume: 61cc: Intake Port Shape: Cathedral: Intake Runner Volume: 200cc: Exhaust Port Shape:1996 Camaro Z28 forged 385 A4-, match ported heads and manifold with 3 angle valve job, 52mm custom ported tb, cc503 cam, 1.6 ratio rockers, dual spring valves, lt1 edit, pacesetter long tubes, 3.73 gears, t/a push button, tb bypass, 2.5" true dual exhaust with H, 3k TC, ls1 home made intake, and going in a simple diet1996 Camaro Z28 forged 385 A4-, match ported heads and manifold with 3 angle valve job, 52mm custom ported tb, cc503 cam, 1.6 ratio rockers, dual spring valves, lt1 edit, pacesetter long tubes, 3.73 gears, t/a push button, tb bypass, 2.5" true dual exhaust with H, 3k TC, ls1 home made intake, and going in a simple dietThe L96 engine is a 6.0L Gen. 4 small block engine used in GM trucks and SUVs from 2010 to 2017. It replaced the LY6 and added Flex Fuel capability. For marketing purposes, it was also known as the Vortec 6000. The engine specs and information listed here is for a stock L96 engine. Mechanically similar, General Motors’ LS and LS-based …Intro to L59 Engines. Meet the hidden gem that helped start the LS-swap craze. The L59 (along with the LM7) is a Gen. III, 5.3L iron block truck engine you can pick up in wrecking yards for about $600. The engine was introduced in 2002 and received a 10 horsepower bump to 295 in 2004 and was made through 2007.Cylinder Head, Pro Action LS Cathedral Port, Bare, Aluminum, 65cc Combustion Chamber, 0.570 in. Lift Springs, 15 Degree, Chevrolet, LS, Each. Part Number: RHS-54240-06. Not Yet Reviewed. Free Shipping; Special Order...Loading Not Available At This Time. This product cannot be ordered at this time. Future availability is unknown.Though the debate of 317 vs. 706 heads seems to never end, I can't deny that 317s are good for turbocharged engines. If the 706, 243, or the later 799 is the go-to head for any engine, the 317 is just right behind. ... According to LS 317 head specs and after my testing, I consider it an excellent option. They provide greater volumes of ...LQ4 with 317 heads: CR = 9.41:1 (advertised CR) DCR = 8.24:1 LQ4 with 706 heads: CR = 10.42:1 DCR = 9.11:1 That cam is an excellent towing cam. It's meant for stock engines, as you can see from what happens with smaller chambers than factory. 8.2:1 DCR is about the limit for 91 octane. 93 gives a little more room, but 9.11:1 no way.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 ...Casting number 862 or 706 heads were used and sported a 61cc chamber but had tiny 1.890 intake valves. The stock heads can be CNC-ported for more airflow and milled up to .030 inch for more compression. Flow numbers can be as high as 325 cfm at .600-inch lift. ... The Definitive Guide to LS Engine Specs and LS Engine Upgrades. …Description: 99-06 Chevy LS 5.3L V8 706/862 Aluminum Cylinder Head - PAIR. Introducing our Remanufactured 9-06 Chevy LS 5.3L V8 706/862 Aluminum Cylinder Heads - a perfect upgrade for your vehicle's performance. These heads have been meticulously crafted to exceed OEM specifications, ensuring top-notch quality and reliability.Our fellow tech writer and dyno-flogger Richard Holdener reports a gain of roughly 15 hp with stock 5.3-liter heads on a 6.0-liter. Our 5.7-liter head test bumped the average power by 9 hp but ...Sep 30, 2019 · Surprising HP Numbers From Our Stock LS Cylinder Head Test I have ported 2 sets of LS heads so far and one was the 706. I did not flow it though but I was impressed at the shapes of the LS runners. I also did some LQ9 heads for a buddy and noticed an area that looked like reversion was happening where the air comes towards the rocker stud boss.The L86 is a Gen. 5, 6.2L, small-block engine powering 2014-present GM trucks and SUVs. They are known as the EcoTec3 6.2L engines. These engines use a longer intake runner than its cousin, the LT1.This helped the L86 produce peak torque 500 rpm sooner than the car version of the 6.2L engine.For well over two decades, GM put LS engines in everything from sports cars to cargo vans. That means the factory produced the LS in a range of displacements, starting at 4.8L and topping out at 7.0L. So if you're thinking about an LS engine swap, LS engine build, or LS engine upgrade, the first number you'll probably look at is ...Here are my specs; LS7 heads with stage 2 porting and milling by WCCH, OEM rockers, OEM Ti intake valve (78 grams) Ferrea hollow stem exhaust valve (90 grams), custom cam with comp LXL lobes 222/246 .638 .652 116+1, 13.3:1 SCR, rev limiter at 7300 rpm. The LXL lobes are designed for a 1.8 rocker with a softer seat landing is the reason I chose ...All SBC gen I and Gen II heads will bolt onto the block. The LT1 and 4 heads are set up for reverse coolant flow (i.e. the water goes from the heads then through the block) so those aren't what you want to use. The center bolt non-vortec heads (87-96) use a slightly different intake manifold. The center bolts on either side of the carb are at a ...Intro to the LMG Engines. The LMG came in GM trucks and SUVs in 2007-'14 and made between 310-326 horsepower horsepower right out of the box. It's a Gen. 4 5.3L iron-block engine, so you're getting the better intake manifold, connecting rods, and ECM. The engine also had 799 or 243 casting heads which are closely related to the LS6.The cylinder head gasket is one of the most over-engineered and strained engine parts. That's why even the laziest mechanics or DIYers always tighten the cylinder head bolts to the manufacturer's torque and sequence. Naturally, neither should you. The third generation (LS1 and LS6) LS head bolt torque starts with bolts 1 to 10 and is 22 ft-lb for the first pass, 90° for the second pass, 90 ...Age. 34. Posts. 1,561. Red. 2001 Camaro SS A4. 706 heads on '01 LS1. Just wondering if anyone has played around with this before...I have access to some 5.3 heads (706) and was wondering how how these would do on the LS1 and what type of gains I could see with these. 12-01-2008, 05:31 PM #2.Valve Spring Guide. The LS6 springs, Comp 787-16 retainers and 648-16 locks (or stock locks) will work for a budget set up on a stock cam and 1.6 rocker upgrade. Stock spring locators will work (on alu heads). Set up @ 1.750-1.730, these will work fine on a stock cam. If using an aftermarket cam I would get the Comp 26918-16 or PAC 1218 bee ...Great cylinder-head airflow has been a key enabler of the LS-Series' exceptional performance. Chevrolet Performance delivers those power-building attributes to you with a range of production-style aluminum heads — from the LS6 heads for smaller-displacement engines to LS7 style heads for 427-inch-and-larger combinations, our aluminum heads benefit from Chevrolet Performance's extensive ...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.C5 Tech - 5.3L 706 heads have 11:1 compression on a LS1 ????? - read that 9.5 : 1 is the stock head specs of a 706 but that is on a 5.3 engine. Is the compression closer to 11:1 on a LS1 block?Windows only: Planning an upgrade soon? Save yourself the web searches for your specs and download Speccy. Speccy does a quick scan of your machine and gives you a complete rundown...The MTX Blue Thunder 10 is a car-audio subwoofer. The subwoofer prevents distortion without reducing power. The Blue Thunder subwoofer is small in size and has a sleek design, but ...706 Heads Specs. High-performance cylinder heads like the Chevy 706 LS Heads provide a ton of power at an unbelievable cost. They are the most cost-efficient and efficient remanufactured cylinder heads available, and …933: Found on 1997 LS1 engines up to mid-September. Although 862 and 706 heads share many similarities, the primary difference is that the 706 heads are made using SPM (semi-permanent mold) while the 862 heads are not. This makes the 706 heads slightly superior. Cylinder Head.The 799 head is designed and made to be compatible with high-performing LS engines, such as 4.8L, 5.3L, 5.7L, or 6.0L, etc. These vehicles require maximum airflow, making the 799 head an ideal choice. On the other hand, the 862 head is compatible with LR4, LM4, and LM7 and such engines where low torque is more essential than better horsepower.Nov 2, 2017 · The LS3 is a Gen. 4, 6.2L small block engine used in GM performance cars between 2009 and 2017. The engine specs and information listed here is for a stock LS3 engine. Mechanically similar, General Motors’ LS and LS-based Vortec engines wound up on almost every branch of the GM family tree: Chevy, Pontiac, GMC, Cadillac, Buick—heck, even ...Cylinder Head Bolts: 65 ft.-lbs. Screw-In Rocker Arm Studs: 50 ft.-lbs. Intake Manifold Bolts (Cast Iron Heads) 30 ft.-lbs. Oil Pump Bolt ... Bellhousing Bolts: 25 ft.-lbs. Exhaust Manifold Bolts: 25 ft.-lbs. Notes. These specs are for stock-type bolts with light engine oil applied to the threads and the underside of the bolt head. Moly and ...Tech: GM 1st Gen Heads vs. Vortec Heads Reader Guide. By Bobby Kimbrough April 13, 2015. Chevrolet's small-block Chevy was manufactured beginning in 1955, and the first-generation engines (Gen I) can still be purchased as a replacement crate-engine through Chevrolet Performance. In 2005, General Motors estimated that 90 million SBC engines ...Learn what a 706 credit score means. See if 706 is a good credit score, what loans you can get & more. Everything you need to know about a 706 credit score. Find out if 706 is a go...Valve Spring Guide. The LS6 springs, Comp 787-16 retainers and 648-16 locks (or stock locks) will work for a budget set up on a stock cam and 1.6 rocker upgrade. Stock spring locators will work (on alu heads). Set up @ 1.750-1.730, these will work fine on a stock cam. If using an aftermarket cam I would get the Comp 26918-16 or PAC 1218 bee ...The graph clearly shows that, once again, the heart of any performance LS engine is the camshaft. Run with a factory LS9 cam, the 5.3L combo produced 428 hp at 6,200 rpm and 400 lb-ft (399.9) at ...No 243s or 799 have the casting defect that I've heard, it was pretty isolated to the castech only 706's on gen III 4.8/5.3's. There are 2 other sets of 706's that are not affected. The early sand cast heads come as 862s and 706's, and a die cast 706 that isn't made by castech. 16 posts.My friend has a pair of 862 heads in good shape for a good price. Just wanna know if I'll benifit from them at all from stock ls1 heads. I have a mild cam 218/227 long tubes and a lid plan on doing heads and a LS6 intake. I know 243's are good but didn't know if 862's are any good when they're right in front of me. They won't flow as good as ...The part number for these heads is LS#CNC-Complete. Test 5. Mast Black Label LS3 (Large Bore) Retail price:$3,198. Intake valve size:2.20. Advertisement. Exhaust valve size:1.60.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 …Spring specs are 155 lbs @ 1.780", 380 lbs @ 1.180", 400 lbs @ 1.130, coil bind @ 1.070" This is a drop in spring kit for all 15 degree LS heads including LS1 LS2 LS3 LS4 LS6 L76 L92 L99 LQ4 LQ9 L33 LSA. ... Designed to be used with stock rocker arms. Drop-in kit for 15° LS heads. It will also work with LS7 heads when used with a .045" washer ...LS and Vortec Engine Specifications. Engine. ... The LS1 heads have 67cc chambers with 2.00/1.55-inch valves. ... Other heads you'll run into are 852 or 706 castings which have smaller 61cc ...I thought I would go with stage 3 ported heads, nope too big for stock bore ls1. What about all these heads with massive intake runners 225cc+ but smaller valves IE: 2.04/1.57. Nope, again too big of an intake runner for stock bore LS1. Wait, this other guys says the will work great as long as I use a Fast 102 or ported 90.The GM L59 (Vortec 5300) features a V8 90° cast-iron cylinder block with a five-bearings crankshaft, two aluminum heads, a single one-piece cast camshaft, and two valves per cylinder (16 in total). The L59 has a sequential multi-port fuel injection system and an electronic throttle body. The engine used a “Coil-Near-Plugs” ignition system ...Object moved to here.No Upgraded Valve Springs. Chevrolet Performance - LS7 Spring Pack w/ Retainers, Seals. $ 650.15. Brian Tooley Racing - .685" Lift Valve Spring Kit with Titanium Retainers for LS7 Engines (SK702) $ 359.00. PSI - Beehive Spring Pack, .625" Lift (1511ML) with Titanium Retainers. $ 470.00.