The L9H is a 6.2L, Gen. 4, small block engine used in GM luxury trucks and SUVs between 2009 and 2013. For marketing purposes, it was also known as the Vortec 6200. The information listed here is for a stock L9H engine. Mechanically similar, General Motors' LS and LS-based Vortec engines wound up on almost every branch of the GM family tree ...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 …Jul 3, 2023 · Cylinder Head: Material Composition: Port Design: Combustion Chamber Design: Valve Configuration: Compatibility: Performance Potential: 706 Heads: Cast Iron or Aluminum: Cathedral: Varies: 2 valves per cylinder: Small-Block and LS Engines: Good potential with mild modifications: 823 Heads: Aluminum: Cathedral or D-Shaped: Varies: 2 valves per ...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 ...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.Aug 29, 2022 · The 5.3 liter LS-series engine was offered from 1999-2014 and has a 3.78” bore x 3.62” stroke. The block was offered in both cast-iron and aluminum with aluminum cylinder heads. Camshaft specifications varied depending on the year and RPO code of the engine.Max lift for the 4.8 with 706 heads??? 215/231 with a .631/.644 lift @ 118lsa. If I have the .650 dual valve springs, retainers, and pushrods will this cam work, or will I have to get a better intake to see the power. LSA should be a good street cam or turbo cam right?2014-present - Gen. V, 6.2L, small block. The new LT1 is the Gen. 5, 6.2L, small block engine used in Chevrolet performance cars. It was introduced in the 2014 C7 Chevy Corvette. LT1 engines are all-aluminum and use Active Fuel Management (AFM) and Variable Valve Timing (VVT). The engines also use direct fuel injection technology, which ...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.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 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 Compare to the normal 6.0 ...The Gen III engines were the firstborn from the original LS1 in 1997 through 2002. These engines used a 24x crankshaft trigger wheel and a cam sensor mounted at the rear of the camshaft. Roughly in 2003, GM upgraded the LS into its Gen IV configuration with a number of changes. The upgrades included a 58x crank trigger wheel with the …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 ...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 ...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 ...The L33 engine with VIN code "B" is also called the Vortec 5300 HO. The GM L33 features V8 90° aluminum 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 L33 has a sequential multi-port fuel injection system and a 78.0 mm electronic throttle ...The intake and exhaust ports on the 243 heads are larger than those on the 799 heads, which allows for more air and fuel to enter the engine. This can result in higher horsepower and torque output. However, the smaller ports on the 799 heads can provide better velocity and airflow at lower RPMs, which can be beneficial for street-driven vehicles.In this video I buy a set of 40 dollar LS 706 cylinder heads from Facebook marketplace. I clean them up and lap the valves to restore the valve seats that we...Do not do that. 706's have 61.5 cc chambers and 243's have 64.5 cc chambers so you will lose compression unless you mill down the 243's. 799 and 243 heads are generally accepted as 100% identical. The 243 could come on a truck, or a z06 with lightweight valves, which are also longer than all the other standard LS valves.Advertisement The variety of Android tablets on the market make it difficult to sum up specifications. Android tablets are really just specialized computers. In general, most table...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.The Definitive Guide to LS Engine Specs and LS Engine Upgrades. Posted 10/03/19 by OnAllCylinders Staff. Last updated on 05/03/2024. (Image/Summit Racing) This is the ultimate LS engine swap or engine upgrade resource. Scroll through the tables below to find the LS or LS-based Vortec truck engine that you own or are interested in building.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.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 862 heads are inferior to the 706 heads in terms of compression, and they don’t also flow well like the 243 heads because it doesn’t have other competitive features; however, depending on your car’s needs and budget, the 862 cylinder heads might be a good port for you.JEGS 210840 - MLS Cylinder Head Gasket for GM LS Engines [Bore: 4.020 in.] $42.29. JEGS 210870 - Valve Cover Gaskets for GM LS Engines ... Specifications: Part Type. Exhaust Valve. Product Line. JEGS Performance Stainless Steel Valves. Lock Groove Quantity. 1-groove. Overall Valve Length. 4.890 in (124.206 mm)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.5. Clogged Nozzle. If you’re having trouble with the windshield wipers, check for a clogged nozzle. To do this, turn the ignition on and then turn it off. Open the hood of your car and look for a small white cap on one side of the wiper assembly. This is where you will find your nozzles.: Get the latest LS stock price and detailed information including news, historical charts and realtime prices. Indices Commodities Currencies StocksLets compare the heads: Casting Number 706 / 862 Head: 1999+ LR4 4.8 Litre Truck 1999+ LM4 /LM7 5.3 Litre Truck Material: Aluminimum 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 Compare to the normal 6.0 ...This program works on the following head casting numbers: 821. 823. 716. Now you can get this porting service on your cylinder heads at an incredibly low cost! Simply follow this procedure: Remove the cylinder heads from your car. Disassemble cylinder heads to completely bare condition. Wash cylinder heads.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.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 …Most heads are swappable but some will reduce power. Some won't fit as some heads are designed for a wide bore. But don't worry, most LS heads are so good ...The 799 and 862 heads have their own pros and cons. While the 799 heads offer better flow and performance, the 862 heads offer better combustion chamber design and improved efficiency. Ultimately, the choice depends on the specific needs and goals of the engine. Pros of Using 862 Heads. Cons of Using 862 Heads.The 862 head is commonly utilized in high-performance cars, racing, and sports cars. It's also found in some luxury and sports cars. The 862 is a 12-valve design that utilizes two intake valves per cylinder and one exhaust valve per cylinder. The combustion chamber volume is 84cc for the 862S, 83cc for the 862C, 84cc for the 862F, 82cc for ...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 ...Feb 10, 2023 · To help make power, the SP 5.3L also featured a set of ported 706 heads. Katech provided the porting for the 706 heads, though the porting program retained the factory valve sizes. Given our sizable cam choice, the Katech 706 heads were also treated to a dual valve spring package from Brian Tooley Racing , stock rockers, and hardened Trend ...: Get the latest LS stock price and detailed information including news, historical charts and realtime prices. Indices Commodities Currencies StocksNew “862” or “706” casting cores are CNC-ported and machined to specifications dictated by extensive research and testing. Each set of heads is milled …The LS3 was run with a Holley HP management system and FAST injectors. With stock heads, the modified LS3 combination produced 552 hp at 6,400 rpm and 513 ft-lbs of torque at 5,000 rpm. After installation of the TFS Gen X 255 heads, the power numbers jumped to 571 hp at 6,500 rpm and 525 ft-lbs of torque at 5,200 rpm.Overview About 823 LS Heads. Once you need to supply decent power to your sports car with an LS engine and push its performance to a new height, the 823 LS heads – also known as the L92 heads – are an ideal option. This model was first introduced in 2008, and it is set up in the Corvette C6, which belongs to the LS3 of the General Motors ...Mar 25, 2024 · If the 706s are useable as-is, just run those. Then when you add the turbo, bolt on the 317s. Also consider the SUM-8728R1 cam 212/218 110+3 .600/.585. Similar specs to the BTR Truck Stage 2, but the additional valve lift will complement boost.For the sake of mass production, the production Gen III V-8 cylinder heads were designed to fit the smallest-bore Gen III V-8 engines--the 4.8L and 5.3L, 3.780-inch-diameter cylinder bore SUV and ...Expedited Core Exchange - We will ship you a set of CNC ported heads fresh out of the machine and set up to your cam specs once the order is placed. Once your usable cores have made their way to us, LME will refund the cost of the cores. Current GM LS1 243 Cylinder Head core value is $250.00.Swapping over to a set of 862 LS heads unleashes the true potential of built 5.3L engines. They can support up to a 230/238 .600" camshaft, 11:1 compression, and intake/headers for over 450 wheel horsepower. On a paired with a larger cam, the 5.3L engine really wakes up with 862 heads. They enhance the entire powerband, help it rev higher ...The factory 706 head casting may be the best LS performance value going. Here's why. ... Vital Specs for 706, 852, and 862 Castings. 1999+ LM7 5.3-liter/LM4 4.8-liter; Material: Aluminum;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 ...Product Details. Beehive style springs. Used on LS7 cylinder heads. 1.960" installed height @ 101 lbs. pressure. 1.368" @ 310lbs. pressure.The answer of whether 706 heads are better than 243 heads may depend largely on how you plan to use them and what engine you are putting them on. What Are …From cylinder heads to the camshaft, here's a complete rundown of all the vital engine specs you need for the 5.3L LM7 Vortec LS engine. ... LM7 Cylinder Head Specs; Casting Numbers: 862, 706: Material: Aluminum: Combustion Chamber Volume: 61cc: Intake Port Shape: Cathedral: Intake Runner Volume: 200cc: Exhaust Port Shape: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.As mentioned about the LS 823 heads specs, its bigger intake port owns a 70cc, whereas the common 243 L6 cylinder heads have basically a smaller volume at 64cc. ... 823 vs 706 Heads. The 706 cylinder heads are built to generate excellent performance, which can reach up to 4,000 rpm.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.The Enforcer heads have a 210cc intake port volume along with an 82cc exhaust port volume. The heads use a standard LS 15-degree valve angle with a 1.500-inch outside diameter valve spring pocket. The combustion chamber measures 64cc's in size and the heads need an engine with a minimum 3.900-inch bore diameter. Why AFR Introduced The Enforcer.It'll break down each of the LS engine's most popular displacements, starting with the many varieties of the venerable 6.0L LS. (Spoiler alert: there's way more than just one 6.0L LS engine.) Learn more about each LS engine displacement: * 4.8L LS Engine Guide: Block Specs, Swap Resources & Build Info. * 5.3L LS Engine Guide: Block Specs ...Texas Speed Brawler LS6 Style Cathedral Port CNC Cylinder Heads. Fits 1997-2013 LS-Based Engines 4.8L 5.3L 5.7L 6.0L . If you are looking for great factory style replacement/upgraded LS1/LS6 Cathedral Port cylinder head, look no further than these fully CNC ported Brawler cylinder heads! These all-new castings are modeled after a factory GM 243 ...Previously, we compared the stock 706/862 heads to the 799/243 heads on a cammed 5.3L test motor. There was much uproar among 799/243 head enthusiasts. Than...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.Despite numerous differences the Gen III LS Engine and Gen IV LS Engine cylinder blocks share a lot of the same traits. 4.400 Bore Spacing (same as the original SBC) Deep Skirt Block with Six Bolt Cross Bolted Main Bearing Caps (reminiscent of the old Ford side oilers, FE, and some early hemi blocks) Center Main Thrust Bearing. 9.240 Deck Height.Record the amount of water added and the mass of the soil-filled mold. 5.1.3 Remove the material from the mold and cut vertically through the centre, taking a representative portion to determine and record the moisture content according to the Method of Determination of Moisture Content of Soils (MTO Method of LS-701).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 ...This head is intended for blocks that feature a minimum cylinder bore diameter of 4.00 inches. The LS3 cylinder head has 260-cc intake runners and 92-cc exhaust ports. In addition, it has a combustion chamber volume of about 68.4 cc. These heads fit any LS engine with cylinder bores of 4.000 inches or larger.Aug 1, 2014. #5. I've got one of those Max Ellery repair manuals here's what it says might help. Bolts under rocker cover are M11. Bolts Not under rocker cover are M8. Cylinder Head Bolt Torque: Step 1 : All bolts M11 and M8: 30Nm. Step 2 : M11 bolts a further 90 degree turn. Step 3 : M11 bolts 1-8 a further 90 degree turn.Last updated on 05/06/2024. The L92 is a 6.2L, Gen. 4, small block engine used in GM luxury trucks and SUVs between 2007 and 2008. For marketing purposes, it was also known as the Vortec 6200. The information listed here is for a stock L92 engine. Mechanically similar, General Motors’ LS and LS-based Vortec engines wound up on …Description. Porting service for LS 5.3L 862 aluminum cylinder heads, customer supplied bare castings. CNC-Motorsports Porting / Machining Service includes. Clean bare …Mar 12, 2021 ... Experimenting with porting the 862/706 heads using the smaller 1.89” intake valve. As a test I created a moderate 208cc intake port keeping ...The 243 heads made about 20 RWTQ everywhere compared to the 317 heads, the chamber in the LS6 head is far superior to the 6.0 chamber. Bear in mind ECS had these same Stg 3 make over 600 RWHP on a N/A, hyd roller cam, pump gas engine that same year. Ask me about my LS and Modular spring kits! Always in stock!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 the GM family tree ...Let's start with the basics: You're more than likely mispronouncing it. Photo courtesy of Medellin.travel Rather than saying Medellín like “meddling,” the two ls are actually prono...Cylinder Head, GenX® 205, Competition Ported, Assembled, 58cc CNC Chambers, GM LS Vortec, Each See More Specifications | Check the Fit. Trick Flow® GenX® 205 Cylinder Heads for GM LS 4.8L/5.3L/5.7L (Vortec) TFS-30510001-C00 TFS-30510001-C00. Part Number: TFS-30510001-C00. Estimated Ship Date: Aug 22, 2024. $1,184.99. Overview.LS COMBO DOME - compatible with LS1/2/6 style cathedral port heads & LS3 / L92 style rectangular port heads (Does not fit LS7 or 5.3L 706 & 862 Truck Heads) 1.0, 1.0, 2.0mm File Fit Performance Ring Set Included 65cc 66cc 70cc 402 4.000 4.000 6.125 1.110R 0.927 9.2cc 454 13.9 13.7 12.9 2618 0.500 0.0044 0.0054 930229600Upgrade 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 within the ...The 6.2-liter LS3 engine offers outstanding performance in factory form, with 430 horsepower available at 5,900 rpm and 424 lb-ft of torque present at 4,600 rpm. A long view of the Pro1 LS3; Dart has engineered these to use both stock valve dimensions and stock valvetrain components. They will also accept aftermarket replacements.Found a set of 706 heads to port. ... Any do's and don't on these as porting work is all over the place on LS heads on line. L-29 461 BBC 11.10@118mph 9-30-22 10.65@125mph 406 with home ported Dart 215 heads. 10 sec. Vortec 062's 406 w/hyd. cam and stock rocker armsGM 4.8 / 5.3 Cylinder Head PAIR Casting # 706 Chevy Silverado Suburban Yukon V8 OHV LR4 / LM7 / L59 / LM4 GMC 1999 - 2007 ... - All parts are cleaned and inspected before final assembly to meet AERA specifications. NO UPFRONT CORE CHARGE CORE RETURN REQUIRED WITHIN 21 DAYS OF DELIVERY ... GM 4.8 5.3 OHV Cylinder Head Casting # 706 LS V8 Chevy ...Oct 12, 2017 · 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 ...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. It made 590 Lbs TQ and 625 HP. it came in the start of the pull at 4000 rpm making 575 LBs.Morning yall, 5.3 LM7 aiming for 450-500HP. Have the stock steel 706 heads and heard they are pretty solid for a stock casting, weighing if I NEED work done to them so they aren’t my limiting factor. I am putting a summit pro kit which bores it out to 5.4 with -2CC pistons which should be about 11.1:1 on the 61.2 chamber size of the 706 head.A pair of Chevrolet LS 706 cylinder heads With complete valve job. We also work on all types of cylinder heads. Our shop is devoted to rebuilding any cylinder head, resurfacing. Garland, TX. Location is approximate. Message. Auto Parts. See all. $5,500. 1965 Ford Mustang. Oswego, KS. $1,700. 69 C10 Chevy project. Columbus, KS. $950 $1,500.ls1 g 305-350 5.7l 3.900 3.620 ls6 s 385-405 5.7l 3.900 3.620 lr4 v 255-285 4.8l 3.780 3.300 0.052 3.835 9.8 oe# 12575329 28-12575329 lm7 t 270-295 5.3l 3.780 3.620 26191 pt/54441 ... gm ls and lt cylinder head gasket chart enginepro.com engineproshopsolutions.com. created date:The LQ4 and LQ9 are Gen. III, 6.0L, iron block, truck engines. The LQ4 served in anything from bread-vans and boats to SUV’s between 1999 and ’07. It started off life like any normal truck engine. Iron heads, small cam and the old SBC crank rear flange thickness. That changed in 2001 when GM threw in the bigger cam and aluminum heads ...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 . 12561706The factory 706 head casting may be the best LS performance value going. Here's why. ... Vital Specs for 706, 852, and 862 Castings. 1999+ LM7 5.3-liter/LM4 4.8-liter; Material: Aluminum;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.Description. This program works on the following head casting numbers: 862. 706. Now you can get this porting service on your cylinder heads at an incredibly low cost! Simply follow this procedure: Remove the cylinder heads from your car. Disassemble cylinder heads to completely bare condition. Wash cylinder heads.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.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.. Revised Video of the LS 706 4.8l heads706 5.3L HEADS vs 241, 799/243 vs 317s. WHICH HEADMAK 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 …The Gen III have 862/706 Gen III heads, and the Gen IV have 243/799 heads. The 862/706 heads have smaller combustion chambers than the Gen IV, raising the compression ratio when swapped directly. 706 Vs. 799 Heads. When testing these two types: 799 vs. 706 heads 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. Dyno Review - Cammed 6.2l LS, 706 Heads | 12:7:1 CompressionCh...
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