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.
( 5 )
$3,011.40
—
$3,490.20
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 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
Looking for big LS engine power at an affordable price? Summit Racing™ remanufactured 5.3L LS long block crate engines are rated at 450 HP and 420 lbs.-ft. torque! This engine will give you the performance and drivability you have been searching for at a price you can afford. It can be a performance upgrade for 99-07 Chevy trucks, or an engine swap into your project vehicle. You will save time and money by leaving the machine-work and assembly to us. Just bolt on your accessories and drop it in. These engines are machined and assembled for us by the guys at ATK, and backed with a 2-year unlimited mile warranty for peace of mind. Technical specifications: * Horsepower: 450+ * Torque: 420+ * Block: Seasoned OE LM7/5.3L iron * Bore/stroke: 3.800-3.820 in. x 3.622 in. * Year range: 1999-2007 * Displacement: 323 C.I.D. * Crankshaft: OEM GM 3.622 in. stroke internally balanced 24-tooth reluctor wheel * Connecting Rods: OE GM forged powder metal 6.093 in. * Pistons: Hypereutectic flat top * Piston rings: Moly * Compression ratio: 10:1 compression * Camshaft: Summit Racing Pro LS Roller * Camshaft specifications: Lift- 550/550, Duration @.050- 222/232 * Camshaft bearings: Installed and clocked to OEM position * Cylinder heads: #799 or #243 OE aluminum 64cc 2.00 in./1.55 in. valves * Freeze plugs: Brass installed and sealed * Rocker arms: OE powdered metal 1.7 ratio * Oil Galley plugs: Installed and sealed
( 39 )
$3,849.99
Summit Racing™ Pro LS 5.3L forged rotating assemblies provide industry-leading fit, finish, and durability at an affordable price. These kits are tested to over 1,200 hp in turbo applications. They're available in a wide range of fitment and performance options. Standard features and specs may include: * 4340 forged steel crank * Core hardened to optimum strength, tempered, and nitride hardened * Lightening rod journals, gun-drilled mains, and profiled counterweights for better engine acceleration * Maximum journal tolerances of +/- .0001 to ensure consistent bearing clearance * Straight-shot oiling for maximum oil film strength at the maximum load angle * 4340 forged H-beam connecting rods * Designed for 5,000 ft./min. average piston speed in street and drag applications * 7/16 ARP 2000 rod bolts with 200,000 psi tensile strength; dual ribbed caps for maximum strength * Added stroker clearance and balanced to within +/- 1 gram per end * Full-floating and precision-honed in the USA to +/- .0001 in. * 2618 forged aluminum pistons * Ultra-modern 2618 alloy forgings for boost and nitrous with maximum ring land thickness * Pressure-fed pin oiling with durable chromium steel wrist pins * Specially profiled and coated piston skirts for stroker applications with tight piston-to-wall clearance * Generous valve reliefs for extra piston-to-valve clearance accommodate cathedral and rectangle heads * Premium steel piston rings * Steel top rings designed for maximum life with boost and nitrous * File-fit rings for maximum ring seal, reduced friction, and tensions optimized for wet sump engines * Martensitic ductile Napier-hook second rings for strength and maximum oil control * Premium main and rod bearings * Clevite H-bearings are designed for high-rpm operation in racing applications * Tri-metal bearings designed with high bearing crush for maximum retention * Medium eccentricity shells with precision wall tolerance of +/- .00015 in.
Not Yet Reviewed
$2,564.87
—
$2,827.87
What's the easiest way to build high-quality rotating assemblies? Callies Compstar Speed Packs! Using components specially chosen for each application, Speed Packs are built around reliable 4340 forged steel Compstar crankshafts and connecting rods. Callies adds proven "brand name" components—forged aluminum performance pistons, ring sets, locks, and rod and main bearings—creating perfectly matched performance assemblies and a successful outcome for your project. Callies is serious about their quality and your success. Every Speed Pack crankshaft is dynamically balanced to components that are weight-matched to exact tolerances. You won't have to guess if you've paired the right components for power. Save by making the winning choice—Callies Compstar Speed Packs—the best choice for you, your car, and your wallet!
( 1 )
$2,850.00
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
—
$4,810.99
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
Rely on Jesel Pro Aluminum Series shaft rocker arms to move you into the winner's circle. Their custom blended 7000 Series aluminum alloy allows for an extremely durable and lightweight valvetrain assembly with a tensile strength at 300 degrees to far exceed that of less expense, industry-standard 2024 alloys. Jesel Pro Series rocker arms have profiled rocker tails and clipped-pin nose rollers, and they are shot-peened for increased resistance to fatigue failures. They are offered in standard slot, Mohawk beam, and solid body styles, as well as different ratios individually and in sets. Features of Jesel Pro Aluminum shaft-mounted rockers: * Longer rocker arms provide higher rocker ratios * Proper travel arc geometry * Enough rocker-to-valve spring clearance to run big race springs * CNC-machined aluminum rockers are extra rigid to insure true rocker ratio * Shaft mounting reduces reciprocating mass for high rpm use * Easier access to valve springs, lash caps, retainers and locks * Longer valve spring life
Not Yet Reviewed
$2,265.00
Eagle Pro Street rotating assemblies consist of name-brand quality components for a wide range of applications at an affordable price. These kits feature a crankshaft, pistons, piston rings, rod and main bearings, and connecting rods.
( 1 )
$2,119.99
—
$2,731.99
These Chevrolet Performance serpentine accessory drive kits include the brackets, pulleys, and hardware that your engine needs, saving you the time of obtaining and matching them individually. You can depend on Chevrolet for the performance parts that you need.
( 1 )
$2,212.86
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
$2,399.00
—
$4,100.00
Eagle rotating assemblies can take a lot of worry out of your engine building project. Eagle's heavy-duty rotating assemblies consist of name-brand quality components for a wide range of engines at an affordable price. Perfect for the most extreme competition engines, including exotic fuels, heavy nitrous, and high boost, Eagle's HD rotating assemblies are equipped with Eagle's forged 4340 center-counterweighted crank (when available), forged H-Beam rods with ARP 2000 or L19 bolt upgrade and purpose-built heavy duty pistons. The pistons used in Eagle's heavy-duty assemblies are built for high boost levels or bucket-loads of nitrous. Every part is top-of-the-line and ready to support whatever you want to throw at it. Most all assemblies are available balanced or unbalanced if you'd rather your machine shop balance it. Along with crank, rods, pistons, every assembly includes bearings from either King or Clevite and rings suited to the intended application. Externally balanced assemblies balanced by Eagle will also include a harmonic damper and flexplate (or flywheel for some Fords) from Pioneer. Order the model designed for fitment on your year/make vehicle and engine application.
Not Yet Reviewed
$3,309.99
ATK High Performance Chevy LS 364 short blocks are 100 percent GM Gen IV blocks. They are built for all motor builds with higher compression, but with the option of running pump gas they will hold up to 700 hp. ATK takes the hard work out of your project by selling blocks that are ready to complete yourself. Every great build needs a solid foundation. Start yours with one of ATK's Chevy LS 364 short blocks. Technical specifications: * For naturally aspirated engines * Block: GM 6.0L iron Gen IV * Bore/stroke: 4.000 x 3.622 * Displacement: 364 c.i.d. * Crankshaft: OE reground 3.622 in. internally balanced 24 tooth * Connecting rods: Scat 4340 forged I-beam with ARP 8740 bolts * Pistons: Wiseco 2618 forged (dished or flat top) * Piston rings: Wiseco GFX with steel top ring * Compression ratio: 64cc = 9.7:1, 68cc = 9.3:1, 72cc = 8.9:1 (can vary due to deck height/gasket thickness) * Camshaft bearings: Installed and clocked to OEM position * Freeze plugs: Brass installed and sealed * Oil galley plugs: Installed and sealed * Weight: 285 lbs.
Not Yet Reviewed
$4,298.99
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
$3,849.00
—
$4,299.00
Eagle competition rotating assemblies consist of name-brand quality components for a wide range of engines at an affordable price. Depending upon your selection, these kits may feature a crankshaft, pistons, piston rings, rod and main bearings, or connecting rods. Balanced assemblies are also available. Order the model designed for fitment on your year/make vehicle and engine application.
( 33 )
$2,682.99
—
$2,995.99
Chevrolet Performance offers a variety of LS bare engine blocks to suit your needs. These Chevrolet Performance LS series cylinder blocks are specifically designed for late model small block engines that run the LS family of cylinder heads. These include the LS1, LS2, LS3, LS6, LS7, LQ4, LQ9, L76, and L92. Their LS block selection ranges from a stock replacement all the way up to Chevrolet Performance's LSX Bowtie block designed to support over 2,000 hp!
Not Yet Reviewed
$2,660.26
United Engine and Machine Speed of Air Hyperformance piston and ring kits are offered for a wide range of Chevrolet, GMC, and Ford vehicles. Speed of Air's peerless engine technology enables internal combustion engines to operate with better fuel efficiency, better performance, and with substantially decreased emissions output. These kits are available in a variety of bore, stroke, rod, dish options and include dark bronze/gold Cerakote coating. Increase your ride's available power and torque with a set of Hyperformance pistons and rings.
Not Yet Reviewed
$2,300.00
—
$2,500.00
Modal Header
Truck / SUV
Jeep®
Restoration
Stock Replacement
Late Model Muscle
Tools
Gifts, Clothing, & More
Circle Track
Street Rod
Powersports
Paint & Body
Marine
Jr Dragster
