Availability
AFR 260cc LS3 Mongoose cylinder heads are 100 percent 5-axis, CNC-ported, and feature titanium retainers, A356 aluminum castings, and Pac Racing springs. These CARB certified heads require 4.000 in. or larger bore applications on up through 454 cu. in. engines operating at or below 7,000 rpm—and flow over 380 cfm at 0.700 in. lift and are designed primarily for street and strip applications. Other structural features include Air Flow Research's trademark 3/4 in. thick head deck, reinforced rocker stud bosses, and thick wall runners provide unparalleled durability. Use of AFR stud girdles and full roller rocker arms are required. When it comes to building power, start with these AFR 260cc LS3 Mongoose cylinder heads.
( 4 )
$3,011.40
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$3,490.20
Trick Flow engineers used the best features of OEM GM LS3 and LS7 cylinder heads, combined with their own race-winning engineering and technology, to create the GenX® 255—the ultimate ultimate square port LS cylinder head for 4.000" and larger bore engines. The heads feature fully CNC Competition Ported runners with a premium high resolution surface finish for maximum airflow and performance potential. Stock LS3 ports accommodate LS3-style intake manifolds and LS9/LSA blower assemblies. The valve angles have been changed from 15° to 12° to increase piston-to-valve clearance and allow the use of larger camshafts. The coolant holes through the head deck were redesigned to work with all LS head gasket and engine block combinations. GenX 255 heads are available with standard or 6-bolt per cylinder mounting patterns. Trick Flow GenX 255 cylinder heads are emissions-legal under CARB E.O. #D-747 for 2007-present GM vehicles with 6.2L engines. They are available fully assembled or as bare castings. Sold individually.
( 7 )
$1,149.99
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$1,599.99
Building on the features that make the GenX® 255 for GM LS3 great—like 12° valve angles and relocated valves for reduced valve shrouding and improved piston-to-valve clearance—Trick Flow's GenX® 280 HIP cylinder heads withstand the abuse of high horsepower, power-adder performance demanded by today's racers and engine builders. The GenX® 280 heads list of features is long, and it starts with the HIP'd (Hot Isostatic Pressed) castings. This process significantly increases the casting's density for improved tensile and fatigue strength. It continues with industry leading airflow through CNC Competition Ported 280cc intake ports and Trick-Alloy™ powdered metal valve guides for added longevity. Manley Severe Duty intake valves and Extreme Duty Inconel exhaust valves are designed to withstand the abuse of extreme temperatures and stresses of big power adder applications. Trick Flow® by PAC Racing dual valve springs, titanium retainers, .750-inch thick deck, and 6-bolt-per-cylinder mounting pattern round out the features. Trick Flow® GenX® 280 HIP cylinder heads for GM LS3 work with all LS3 intake manifolds and LS9/LSA blower assemblies and fit all LS head gasket and engine block combinations. These cylinder heads are available fully assembled or as bare castings. Sold individually. Key features: * 280cc intake ports and 67cc combustion chambers * HIP'd casting * Accepts 3/8 in. pushrods * Powdered metal valve guides * 2.165 in. NK-844 severe duty stainless steel intake valves * 1.600 in. XH-432 extreme duty Inconel exhaust valves * .750 in. thick deck * 6-bolt configuration * Assembled heads include a Trick Flow® LS3 rocker stand
Not Yet Reviewed
$1,349.99
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$1,949.99
Fit any LS engine with Chevrolet Performance LS3 cylinder heads. Manufactured from aluminum alloy, these GM stock replacement heads are assembled with intake and exhaust valves, stem seals, retainers, springs, and locks. Great cylinder head airflow has always supplied the LS Series with exceptional performance. Retain that performance and save yourself time and worry by replacing your tired cylinder heads with Chevrolet Performance LS3 cylinder heads.
( 4 )
$1,068.89
FLOTEK 276cc LS3 cylinder heads feature as-cast high-flow intake runners that flow significantly better than the stock LS3 heads. The ports are in the stock location, so no special valvetrain parts or rocker arms are required. These heads are 15 degree, which is the same as the stock cylinder heads—no special pistons are required. They will work on any LS block that has a 4 in. bore or larger. FLOTEK 276cc LS3 cylinder heads combine high performance and high quality at a value price. Select from bare or assembled models.
( 2 )
$539.00
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$774.00
ATK high performance LS3/L92 25cc as cast aluminum cylinder heads are the perfect budget option for your next LS build. These fully assembled heads are capable of making over 600 hp naturally aspirated out of the box and will come loaded with upgraded components. The springs are set up to be used on up to .650 in. lift camshafts. No reason to swap parts on your new heads when running an upgraded cam! -- Features and benefits: * Bronze valve guides * Dual valve springs for .650 in. max lift * CNC-finished faces and bolt holes for extreme accuracy * 355-T6 high density aluminum * Machined for screw in studs and guide plates * All factory components will fit without modification -- Cylinder Head Specifications INTAKE: * Intake Runner Volume (cc): 252 * Intake Port Location: Standard * Intake Valves Included: Yes * Intake Valve Diameter (in): 2.160 in. EXHAUST: * Runner Volume (cc): 78.8 * Exhaust Valve Diameter (in): 1.600 in. * Exhaust Valves Included: Yes * Exhaust Runner: No * Port Shape: Round * Exhaust Port Location: Standard COMBUSTION CHAMBER: * Combustion Chamber Volume (cc): 69.4 * CNC-Machined Combustion Chamber: No VALVE SPECS: * Intake Valve Angle: 12 degrees (3 degrees rolled) * Exhaust Valve Angle: 12 degrees (3 degrees rolled) * Valve Guides Included: Yes * Valve Guide Material: Manganese Bronze * Valve Seats Machined: Yes * Valve Seat Machine Style: 5-Angle * Valve Seat Material: Chrome Nickle * Valve Stem Seals Included: Yes * Valve Stem Seal Style: Viton® Fluoroelastomer SPRINGS: * Valve Springs Included: Yes * Maximum Valve Lift (in): .650 in. * Spring Pressure Open: 370 @ 1.150 * Spring Pressure Closed: 142 @ 1.800 * Outside Diameter of Outer Spring (in): 1.29 in. * Damper Spring Included: Yes * Number of Springs per Valve: Dual * Retainers Included: Yes * Retainer Material: Chromoly Steel * Locks Included: Yes * Lock Style: 7 Degree ROCKER ARMS: * Rocker Arm Studs Included: No * Rocker Arms Included: N/A * Rocker Arm Nut Thread Size (in): 8 x 1.25 * Rocker Arm Nuts Included: No MISC: * Head Style: Assembled * Cylinder Head Material: Aluminum * Cylinder Head Finish: Natural * Spark Plug Style: Standard * Cover Mounting Style: Standard * Steam Holes Drilled: No * Oiling Style: Through Pushrod * Machined for O-Ring: No * Heat Crossover: No * 10mm Accessory Bolt Holes Machined On Ends of Heads
Not Yet Reviewed
$748.99
ATK offers select parts for your build, including cylinder heads. They use them in their engine combinations and are available to complete your LS engine or upgrade existing components. ATK High Performance 270cc LS3 CNC-ported cylinder head features: * A356 aluminum construction * Stainless steel intake and exhaust valves * Manganese Bronze valve guides * Viton® valve seal * Powder meatal valve seats * Titanium retainers * Spark plug dimensions: 14mm x .708 in. with tapered seat
Not Yet Reviewed
$1,198.99
On Sale
ATK offers select parts for your build, including cylinder heads. They use them in their engine combinations and are available to complete your LS engine or upgrade existing components. ATK High Performance 260cc LS3 CNC-ported cylinder head features: * A356 aluminum construction * Stainless steel intake and exhaust valves * Manganese Bronze valve guides * Viton® valve seal * Powder meatal valve seats * Titanium retainers * Spark plug dimensions: 14mm x .708 in. with tapered seat
Not Yet Reviewed
$1,148.99
$1,098.99
Edelbrock Victor CNC 11-degree 6-bolt LS3 cylinder heads are specifically designed for high-horsepower, naturally aspirated, and boosted applications. Utilizing the popular LS 6-bolt design, they are compatible with the GM LSX block and all aftermarket iron or aluminum 6-bolt per cylinder LS race blocks. The design offers increased clamping capacity over the standard factory 4-bolt configuration and greatly improves head gasket sealing, making them ideal for high-compression naturally aspirated engines and high-boost applications. Edelbrock Victor CNC heads are manufactured with premium materials and machined to the industry's tightest tolerances. They have an 11-degree valve angle, copper infiltrated powder metal valve seats, and fully CNC-machined ports for maximum airflow. The machined runners and chambers, along with the valve angle increase overall flow capability, while the revised water jacket design enhances thermal conductivity and tunability. Premium manganese bronze valve guides withstand long wear with emphasis placed on holding precision tolerances on valve seat concentricity, allowing the valves to seal securely, eliminating leak down and increasing cylinder pressure during engine operation. Finally, the .700 in. thick deck and reinforced rocker rails make these cylinder heads ideal for high-horsepower applications.
Not Yet Reviewed
$1,506.95
Edelbrock Victor LS3 Top-End kits deliver the ultimate in high performance for street/strip applications. To get great performance out of any engine, all of the components must work together, and for over 30 years, Edelbrock Total Power Packages have solved the parts-matching puzzle. Now, their dyno-matched component Power Package Top-End kits, will get you the best Edelbrock performance in-one-box, under one part number, with "no guesswork" involved. And all of the performance marks are real results from engine dynamometer tests on factory short blocks. Edelbrock Victor Jr. LS3 Top-End kits feature: * Victor Jr. intake manifold * Victor cylinder heads * Rollin' Thunder hydraulic roller camshafts with aggressive profiles for maximum power while retaining great drivability * MSD Ignition Control Module Installation notes: * Proper installation is the responsibility of the installer. Improper installation will void your warranty and may result in poor performance and engine or vehicle damage. * Use RTV sealant to properly seal end seals--DO NOT USE end seals gaskets * Sealant must be used on intake bolt threads if the threads extend into lifter valley or coolant passage * NPT/pipe thread fittings require the use of PTFE tape or paste on threads to ensure proper seal * DO NOT overtighten NPT/pipe fittings, this may cause the aluminum to crack around the fitting boss. NPT/pipe thread is a tapered thread.
Not Yet Reviewed
$5,900.95
Edelbrock E-CNC 230 LS3 cylinder heads offer efficiency and state-of-the-art technology for high performance street and entry-level racing applications. These cylinder heads have full CNC-ported combustion chambers, intake, and exhaust runners--for improved airflow and an overall potential for increased performance. E-CNC 230 LS3 heads are equipped with high-quality valve springs, raised exhaust port locations, and spark plug angles that are modified to produce a smooth flame front for fuel efficiency and maximum power.
Not Yet Reviewed
$1,492.50
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$1,937.50
Edelbrock Performer RPM LS3 Top-End kits deliver improved performance in 1,500 to 6,500 rpm street application range. To get great performance out of any engine, all of the components must work together, and for over 30 years, Edelbrock Total Power Packages have solved the parts-matching puzzle. Now, their dyno-matched component Power Package Top-End kits, will get you the best Edelbrock performance in-one-box, under one part number, with "no guesswork" involved. And all of the performance marks are real results from engine dynamometer tests on factory short blocks. Edelbrock Performer RPM LS3 Top-End kits feature: * Performer RPM intake manifold * E-CNC cylinder heads * Pushrods * Rollin' Thunder hydraulic roller camshafts * Complete bolt kits * Edelbrock gasket set * MSD ignition control module Installation notes: * Proper installation is the responsibility of the installer. Improper installation will void your warranty and may result in poor performance and engine or vehicle damage. * Use RTV sealant to properly seal end seals--DO NOT USE end seals gaskets * Sealant must be used on intake bolt threads if the threads extend into lifter valley or coolant passage * NPT/pipe thread fittings require the use of PTFE tape or paste on threads to ensure proper seal * DO NOT overtighten NPT/pipe fittings, this may cause the aluminum to crack around the fitting boss. NPT/pipe thread is a tapered thread.
Not Yet Reviewed
$5,494.95
Brodix BR 3 Chevy LS cylinder heads are the industry's most durable replacement for LS3-style cylinder heads, featuring a 280cc intake which flows over 348 cfm! These all-new heads utilize a 15 degree valve angle, a 71cc combustion chamber—with a 2.165 in. intake and 1.590 in. exhaust valve combination. The cylinder heads accept all standard LS3 components and share each of the legendary Brodix features, including easily repairable A-356 virgin aluminum alloy and the strongest deck surface in the industry. They are available bare or assembled. Order the model designed for your vehicle.
Not Yet Reviewed
$2,144.99
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$4,810.99
These Trick Flow GenX® 205 cathedral port cylinder heads are fully CNC-machined to significantly increase the performance GM's 4.8L/5.3L/5.7L LS engines. Trick Flow engineers altered the valve angles from 15° to 13.5° to decrease valve shrouding, increase mid-lift airflow, and improve rocker arm-to-valve cover clearance. Top-of-the-line CNC Competition Ported runners have a premium high resolution surface finish for maximum flow and performance. The spark plugs were relocated in the CNC-profiled combustion chambers to enhance mid-lift airflow and increase the rigidity of the casting for extreme horsepower applications. Material was added at the rocker arm mounting points to increase high-rpm valvetrain stability. Trick Flow GenX 205 cylinder heads are emissions-legal under CARB E.O. #D-747 for 1997-present GM vehicles with 4.8L, 5.3L, 5.7L, and 6.0L engines. They are available fully assembled or as bare castings. Sold individually.
Not Yet Reviewed
$949.99
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$1,399.99
Are you still confused as to which parts you need to get the performance you want? Quit wasting time and second-guessing yourself. Trick Flow® has already done the work for you with GenX® Top-End Engine kits for GM LS. Designed and dyno-tested to deliver the performance you crave for less than purchasing the parts separately, these kits save time and money! What's in these GenX® Top-End Engine kits? * A pair of Trick Flow® GenX® street/strip cylinder heads * A specially matched hydraulic roller cam * Some kits contain roller rocker arms * Pushrods * Head gaskets * Head bolts * Exhaust gaskets * Balancer bolt
( 4 )
$3,948.91
Welcome to a new class of high performance cylinder heads--BluePrint Muscle Series! These aluminum heads are assembled with the perfect match of components for outstanding, trouble-free performance. Plus, they give you more power behind the wheel and in your wallet! These all-cast heads are designed for hydraulic flat tappet and hydraulic roller cam engines with hefty intake runners, stainless steel valves, Viton® seals, and dual springs. BluePrint Engines stand in front of the class, offering both performance and cost-conscious enthusiasts a powerful alternative--Muscle Series cylinder heads.
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$1,199.00
Are you looking for a set of entry-level street performance heads for your modern street rod, muscle car, or truck? Edelbrock E-Street cylinder heads are just the ticket. These heads feature A356 aluminum castings that are heat-treated to T-6 specs for superior casting strength and quality. Their modern combustion chamber design helps to improve the combustion process and their larger-than-stock intake and exhaust ports help to move more air through your engine. These features improve an engine's efficiency, resulting in more horsepower and torque and improved mileage potential. All Edelbrock E-Street cylinder heads are assembled with manganese bronze valve guides, powder metal interlocking valve seats, and stainless steel one-piece valves with hardened valve tips. Edelbrock E-Street cylinder heads are ideal for entry level street performance engines.
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$1,565.95
Mast Motorsports offers Factory Mast cylinder heads for a variety of Chevrolet small block LS and LT engines from the early 2000s and up. The aluminum rectangular heads are available bare or assembled in a wide range of combustion chamber volumes, intake and exhaust valve sizes, and other options. Combustion chambers and runners are CNC-machined for precision and performance; and valve guides are bronze or powdered metal material. Examine the specs and select the cylinder heads recommended for your application.
Not Yet Reviewed
$1,050.00
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$4,100.00
Mast Motorsports offers Black Label cylinder heads for a variety of Chevrolet small block LS and LT engines from the late 1990s and up. The aluminum rectangular or cathedral port heads are available bare or assembled in a wide range of combustion chamber volumes, intake and exhaust valve sizes, and other options. The Mast cylinder head product line is completely manufactured from a raw casting to a finished cylinder head. Mast refuses to compromise on materials and methods that may jeopardize longevity, performance, and quality. You're assured of getting the highest level of quality and performance on the market. Examine the specs and select the Black Label cylinder heads recommended for your application.
Not Yet Reviewed
$1,675.00
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$5,540.00
Edelbrock Victor Jr. CNC cylinder heads are a CNC-ported version of Edelbrock's Performer RPM heads. These cylinder heads feature a high velocity port design that's ideal for Super Gas, Super Comp, Hi-Po Marine, all-out street and Pro Brackets. Victor Jr. CNC cylinder heads have smaller than stock 11/32 in. valve stems to promote excellent flow and lighter valve weight.
Not Yet Reviewed
$1,640.50
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$1,699.50
Chevrolet Performance LS9 CNC-ported cylinder heads represent a new benchmark in factory engineering high performance, blending the strength and durability of the production LS9 cylinder head castings with the airflow enhancements of precision CNC porting. The result is about 10 percent more efficiency than the production casting, while delivering the greater strength built into the LS9--Rotocast from super-strong A356T6 aluminum alloy. With the Rotocasting method, the mold rotates to more evenly distribute the molten alloy, creating a denser casting that virtually eliminates porosity. And compared to the similar LS3 heads, Chevrolet Performance LS9 CNC-ported cylinder heads feature reinforced webbing and a thicker deck for greater rigidity and minimal distortion. The A356T6 alloy also manages the higher heat of a forced engine more effectively. The heads come fully assembled with production, lightweight titanium intake valves, sodium-filled exhaust valves, and strong beehive-type valve springs that can handle up to .570 in. lift and can be installed on any LS engine with at least a 4.000 in. bore using standard 11mm head bolts.
Not Yet Reviewed
$1,100.90
Chevrolet Performance LS9 cylinder heads can be installed on any LS engine with at least a 4.000 in. bore using standard 11mm head bolts. The LS9, of course, was the supercharged engine in the C6 Corvette ZR1. To support the higher combustion pressure and temperature that come with forced induction, the heads were produced with a unique Roto-cast method in super-strong A356T6 aluminum alloy. With the Roto-cast method, the mold rotates to more evenly distribute the molten alloy, creating a denser head casting that virtually eliminates porosity. And compared to the similar LS3 head, the LS9 features reinforced webbing and a thicker deck for greater rigidity and minimal distortion. The A356T6 alloy also manages the higher heat of a forced engine more effectively. These bare engine cylinder heads are designed, engineered, and tested to rigorous standards, and are backed by General Motors. The replacements are the true OE parts installed during the production of or validated by GM for select vehicles.
Not Yet Reviewed
$564.99
Fel-Pro headbolt kits contain a complete set of the highest quality headbolts and hardened washers available. They're cold-formed to ensure molecular integrity, then heat-treated prior to thread rolling and machining. Reduced-diameter bolt heads eliminate the need for valvetrain removal and facilitate cylinder head re-torquing. The bolts are available in a variety of head styles for fitment on specific vehicle and cylinder head applications.
( 215 )
$28.99
Earl's Performance cylinder headbolt kits are made from premium quality 170,000 psi chromoly alloy steel (about 15 percent stronger than Grade 8). These headbolts are reusable and are the ideal way to upgrade the performance of your engine, and eliminate the hassle and cost of replacing OEM-style torque-to-yield style bolts each time the cylinder heads are removed. Order the kit recommended for your year, make, and engine application. Features include: * Material—chromoly alloy steel * Yield strength—170,000 psi * Finish—black oxide * Reduced wrenching size—provides extra socket clearance * Choose from 12-point or hex head-styles * Wide flanged head provides more support for the extra-thick chromoly washers * Includes premium headbolts, washers, and anti-seize lubricant * Sold in complete engine sets * Reusable headbolts and washers (not torque-to-yield)
( 8 )
$178.95
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$212.95
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