Casting Number 706 and 862 Head: 1999+ 4.8L / 5.3 Liter Truck Material: Aluminimum Part Number: 12559862 12561706 Combustion Chamber Volume: 61.15cc Compression Ratio: 9.5:1 Intake Port Volume: 200cc Exhaust Port Volume: 70cc Intake Valve Diameter: 1.89 inches Exhaust Valve Diameter: 1.55 inches Stock Head Flow …Sep 26, 2020 ... Today I installed and torqued down my LS1 cinder heads for my ls swapped is300 project Chevrolet Orange Engine Paint https://amzn.to/3hIh21D ...David Orr. 2016 Standard Specifications for Roads and Bridges Manual. 4/19/2018 3:08 PM. John Wollerson. 2016 Supplemental Specifications. 3/12/2018 3:00 PM. Frederick Gholston.If you're planning on higher than stock rpm or making more than 500 hp, consider the Comp Cams' Rocker Arm Trunnion Upgrade Installation Kit for the LS1/2/3/6/7 (PN 13702-KIT) as part of your LS ...This is a SET of Rebuilt OE Stock 6.0L LQ4 / LQ9 Cylinder Head Assembly. Part # : 317 , 12562319 , 12562317. Description : Stock 6.0L LQ4 / LQ9 LS Series Cylinder Head Assembly. Specs : Combustion Chamber Volume: 70.03cc Intake Port Volume: 210cc Exhaust Port Volume: 75cc Intake Valve Diameter: 2.00 inches Exhaust Valve Diameter: 1.55 inches933: 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.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 dietNA Hyd. Roller - 202/210 - .472/.478 - 111 - 97 Gen III LS1 Corvette 350 uses 1.7 roller rockers Here is the 140 cam info in more detail, this is from crane who sells a copy of it: Part Number: 968821 Grind Number: 3927140 Engine Identification: Start Yr. End Yr. Make Cyl Description Engine Size Configuration Valve Setting: Intake .024 Exhaust ...RPO L99 and LS3 cylinder heads are aluminum with 68cc combustion chambers, rectangle intake ports with 257cc runners, D-port exhaust with 87cc runners, 2.165˝ intake valves and 1.590˝ exhaust valves. These heads can be CNC-ported to improve on flow and milled for higher compression. These heads are almost the same, but the L99 heads used a ...This head is "designed to have the intake configuration of a LS3 head, but fit the smaller bore blocks of the LS1 and LS6 engines.". Hardest of the Hardcore: LSx-DR - Part Number 19166979. Huge CNC'd intake ports, huge valves, and huge power potential all define the LSX-DR heads. LSX-DR Specs:706 and 862's are small bore (4.8/5.3) gen 3 heads. You might be better off picking up a set of 243/799 heads, doing a VJ and pocket porting those. Will need a newer set of valve covers though. mag2555. Guru. Posts: 4623. Joined: Sun Sep 18, 2011 3:31 pm. Location: Heading for a bang up with Andromeda as we all are.The LS engines with 799 heads are 5.3L and 4.8L. The sophisticated architecture, cathedral-shaped port, and smaller combustion chamber work amazingly on these truck engines. The smaller …A LS1 Head refers to the original design of the GEN III cylinder head produced from General Motors. The design relates to LS2, LS3, LS6, and LS7 heads. ... Casting Number 706 Head: 1999+ LR4 4.8 Litre Truck 1999+ LM4 /LM7 5.3 Litre Truck Material: Aluminimum Part Number: 12559852 ... Corvette Specs; Corvette Insurance; Financing; Corvette ...Automotive Racing Products 1863 Eastman Avenue Ventura, Ca 93003. Tel: (805) 339-2200 Fax: (805) 650-0742 www.arp-bolts.com. INSTALLATION METHOD FOR PRO SERIES ROCKER ARM STUD KITS. Part Number: 235-7202 Application: 7/16 Dia. BB Chevy w/ Dart Aluminum Heads.By Paul Johnson - March 9, 2016. This article applies to Chevrolet Camaro and Pontiac Firebird (1998-2002), as well as all LSx engines. The cylinder head (or "head") has several main functions. Its first order of business is sealing the top of the cylinder (the piston seals the other end). The second order of business is to provide a way for ...401 posts · Joined 2007. #4 · Jan 15, 2009. yep the second design is all short bolts. 2004 IBM M6- SNL V.2 cam, PRC LS6 Heads, Ported FAST92, 90mm Bluemaxx TB, 38lbs inj, Pacesetter LTs, Magnaflow CB, GMM w/ Hurst Handle, Aeroforce, Autometer, MSD, NGK TR6, 85mm LS2 MAF, UDP, Svede1212 OTRCAI, Tuned by Modern Muscle. 445hp/425tq .Head Bolt Kit: 234-3726: Chevrolet LS Gen III LS Series small block (2004 & later - except LS9) w/ all same length bolts, ARP2000, 12pt: Head Bolt Kit: 234-3725: Chevrolet LS Gen III LS Series small block (2003 & earlier), two lengths, ARP2000, 12pt: Head Bolt Kit: 234-3724: Chevrolet LSA, Inconel, 12pt:243/799 LS CNC Ported Heads. Speed Works has teamed up with Wilkes Performance to bring you the most powerful heads available. We have a few options you can purchase such as a pair of Stage 1, Stage 2, Stage 3, or Stage 4 LS 243/799 Cathedral casting 5 axis CNC Porting with stainless valves and WP .660 dual race springs with WP titanium retainers.The 1981 Chevrolet C-10 truck was part of a line of C- and K-series trucks produced by the carmaker for decades. The truck came in a number of variations with different engine opti...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 …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:Casting # 706,862. 71cc chamber; .3154 guide ID. Valve head diameter 1.890-1.920 / 1.550-1.580. (Only 1 Remaining) ENGINETECH EHC293. $357.89: $0.00 ... Complete with Valves and Springs Info . Fits Left; Casting # 706, 862 or Right; Casting # 706, 862. CYLINDER HEAD EXPRESS GM5300. Out of Stock: Add to Cart. ENGINETECH CH1059R Remanufactured ...The factory 706 head casting may be the best LS performance value going. Here's why. News. Reviews. Buyer's Guide ... Vital Specs for 317, 873, and 035 Castings. 2001+ LQ4 and LQ9 6.0-liter truck/SUV;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 ...Key Specifications. The tractor is powered by various International Harvester engines, including a 4.6L 6-cylinder diesel and a 4.3L 6-cylinder gasoline engine. It offers 8-speed and 16-speed transmission types and has a weight range of 7530 to 9160 pounds.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:batboy. 7477 posts · Joined 2005. #4 · Jul 27, 2010. The LS1 and 5.3 Vortec are both Gen III engines and share a lot of the same parts. Obviously, the 5.3 has a smaller bore. 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.Casting Number 706 and 862 Head: 1999+ 4.8L / 5.3 Liter Truck Material: Aluminimum Part Number: 12559862 12561706 Combustion Chamber Volume: 61.15cc Compression Ratio: 9.5:1 Intake Port Volume: 200cc Exhaust Port Volume: 70cc Intake Valve Diameter: 1.89 inches Exhaust Valve Diameter: 1.55 inches Stock Head Flow NumbersThe 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 ...The 3.89-inch bore LS1 and LS6 engines can only use cylinder heads designed for a LS1, LS6, or LS2 engine. The reason is the valves will come in contact with the sides of the piston walls if a cylinder head for a larger bore engine is used. The LS2 and LQ9 engine block has a 4.00-inch bore and will accept LS1, LS6, LS2, and LQ9 cylinder heads ...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.May 31, 2017 · The 706 is easier to get higher compression out of unless the 241 has the chambers welded up and is then CNC'd. I had a set of TEA Stage 2 706 heads on my 99 TA for the last ~15 years and 128,000 + miles. Your compression with the 5.3 heads should have bumped you up to 10.6 as long as your short block is stock.Upgrade your LS1 or LS6 engine with our Remanufactured CNC Ported 243/799 Cylinder Heads with .650 Springs and 2.02/1.59 Valves. These high-performance heads, designed by Chevrolet, are meticulously remanufactured to exceed OEM specifications, ensuring top-notch quality. These CNC Ported LS heads, part number ALL-65056PC, fit engines …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.Here is a repair of a stripped LS (706) spark plug hole. Got lucky this didn't turn into a new head. Had to pull this head off, after the first video of it...DESCRIPTION Professionally rebuilt 4.8 / 5.3 Chevrolet / GM cylinder heads Heads fit 1996- 2007 engines. These cylinder head's casting numbers are: 706 ONLY! These heads do interchange with the 862 casting number heads. THESE HEADS HAVE BEEN REINFORCED BY TIG WELDING AROUND THE FACTORY ISSUE HEAD BOLT …The 243 heads as used on the LS2 motor flow at 260 CFM on the intake. LS6 243s (CNCed) with sodium filled valves flow a little better at 280 on the intake. The stock 241 head flows at 220 on the intake. Either head is a considerable improvement. You can not achieve these numbers by porting 241 heads.Small Block Chevy LS Cylinder Heads by Casting Number 10215339 - LS Small Block V8 1997 346, LS1, aluminum, 68cc chambers . 12480005 - LS Small Block V8 2000 LS1, GTZ, aluminum, 38cc chambers, 2.125/1.625 valves, angle plugs . 12556743 - LS Small Block V8 1999 325, 5.3L, aluminum, truck, van . 12558806Sort 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. 8.706 5.3L HEADS vs 241, 799/243 vs 317s. WHICH HEADMAKES MORE? We compared the four most popular stock LS heads in a back to back shootout. We ran the 706/862...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 ...Description. CNC Ported LS2 - 243 CYLINDER HEADS - Flows 632HP @ .600" lift camshaft! Suits the 5.7ltr and 6.0ltr LS1 & LS2. LS1 LS2 CATHEDRAL PORT. These High Performance LS1 LS2 243 Cylinder heads are a CNC version of the High Performance replacement to the GM 243 heads. All factory mounting points with the Performance of a 243 port and chamber.The exhaust port is a unique D-shape that improves flow. LS6 heads are the best choice only when all-out power is needed. Be prepared for a big price tag at the dealer or steep core charge from your head porter. Casting Number 706 and 862 Head: 1999+ 4.8L / 5.3 Liter Truck Material: Aluminimum Part Number: 12559862 12561706Casting 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. Keywords.3,581. they used to install the 2.0 valves into the 5.3 heads but TSP found out that installing the larger valve actually hurts the flow of the head since the runner was never designed for that size intake valve. 2002 Lightning - GT headed 5.5Litre w/ Twin 7665s. 2002 Silverado - 427Lsx w/ Twin gt4202s.[Trying to find an LS engine for a swap or build? Check out Part 1 and Part 2 of our LS Spotter’s Guide.] … Upgrading LR4 Cylinder Heads. 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.Cylinder Heads & Camshaft Packages. 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 ...[Editor's Note: This LY2 engine upgrade guide is part of a series of LS engine upgrade guides assembled by a team of LS experts at Summit Racing that we are sharing at OnAllCylinders. For a primer on the entire LS engine universe, read LS Engines 101: An Introductory Overview of the Gen III/IV LS Engine Family.]. Intro to the 4.8L LY2 Engines. The LY2 appeared in model year 2007-09 GM 1500 ...If you fall into that category, listen carefully. The most important part of your cylinder head is, as per Fig 6-3 and Fig 6-4, the area 1 inch before the valve seat to 1/2 inch after it on the intake and vice versa on the exhaust. Be aware that what you think is needed may not be what is wanted.CNC Ported LS 5.3L 706 / 862 Cylinder Heads, Customer Supplied Bare Casting. $599.95. Buy in monthly payments with Affirm on orders over $50. Learn more. Options. Resurface for MLS Gaskets + $150.00. Valve Job with new Valve Guides + $400.00. Cylinder head Assembly + $150.00. Add to Cart.Compression: 9.5:1. Chamber Diameter: 3.876. Target Bore Size: 4.000. Combustion Chamber: 64 cc. Compatibility: 4.8-liter and 5.3-liter truck engines. What engine has 799 …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.This also means that they are usually cheap to collect or replace. 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 ...401 posts · Joined 2007. #4 · Jan 15, 2009. yep the second design is all short bolts. 2004 IBM M6- SNL V.2 cam, PRC LS6 Heads, Ported FAST92, 90mm Bluemaxx TB, 38lbs inj, Pacesetter LTs, Magnaflow CB, GMM w/ Hurst Handle, Aeroforce, Autometer, MSD, NGK TR6, 85mm LS2 MAF, UDP, Svede1212 OTRCAI, Tuned by Modern Muscle. 445hp/425tq .The large, raised runners and 12-degree valve angle enable substantial flow that supports large cubic inches. And the large valves necessitate a 4.125-inch or larger …NEW GM LS 317 HEAD - 6.0L. $349.99. Generation III V8 cathedral intake port cylinder head. Casting 12562317. Used in truck, van and SUV applications. Used on 6.0L V8 LQ4 and LQ9 engine models. See Vehicle Application tab for specifics. Add to Wishlist. Skip to the end of the images gallery.Cylinder Head Comparison Sheet GM LS GenX® Series Cylinder Heads for GM LS Product Name Intake Runner Volume Combustion Chamber Volume Valve Sizes Port Flow @ .600" Valve Lift Use GenX 205 4.8L/5.3L/5.7L (Vortec) 205cc CNC Competition Ported, Cathedral Port 58cc CNC-profiled 2.000" intake; 1.575" exhaust 284 cfm intake; 228cfm exhaustHead: 1997+ LS1 5.7 Litre Passenger Car Material: Aluminimum Part Number: 12558806 (1997-98) 12559853 (1999-00) ... Casting Number 706 Head: 1999+ LR4 4.8 Litre Truck 1999+ LM4 /LM7 5.3 Litre Truck Material: Aluminimum Part Number: 12559852 12561706 Combustion Chamber Volume: 61.15cc Compression Ratio: 9.5:1 Intake Port Volume: 200cc Exhaust ...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. …By Paul Johnson - March 9, 2016. This article applies to Chevrolet Camaro and Pontiac Firebird (1998-2002), as well as all LSx engines. The cylinder head (or "head") has several main functions. Its first order of business is sealing the top of the cylinder (the piston seals the other end). The second order of business is to provide a way for ...Torque Specs Engine Parts/Bolts Torque: Camshaft Retainer Bolts 18 lb ft Camshaft Sensor Bolt 18 lb ft Camshaft Sprocket Bolts 26 lb ft Connecting Rod Bolts - First Design (First Pass) 15 lb ft Connecting Rod Bolts - First Design (Final Pass) 60 degrThe torque specifications for automobile engine cylinder head bolts are located on the Federal-Mogul Motorparts website. The search feature is available on the Specifications Looku...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.The exhaust port is a unique D-shape that improves flow. LS6 heads are the best choice only when all-out power is needed. Be prepared for a big price tag at the dealer or steep core charge from your head porter. Casting Number 706 and 862. Head: 1999+ 4.8L / 5.3 Liter Truck . Material: Aluminimum . Part Number: 12559862 . 12561706