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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.
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$3,011.40
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$3,490.20
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
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$3,849.99
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!
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$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
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$3,130.99
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.
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$2,119.99
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$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.
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$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
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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
$3,849.00
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$4,299.00
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
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.
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$2,682.99
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$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
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