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CHEVROLET Chevy small block Gen III/IV (LS-based engines) Engines & Components

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Results 1 - 24 of 76

On Sale

Holley Mid-Mount Complete Accessory Systems

Holley Mid-Mount complete accessory systems achieve what no other accessory bracket systems do--eliminate the brackets! This pulls in all the accessories tighter than other accessory drives by bolting directly to other components for a clean, integrated form. They offer superb engine visibility to show off your horsepower, not your accessories. Holley Mid-Mount complete accessory systems are available in several versions and finishes to match your application. Order the kit designed to fit your engine.

4.6 out of 5 stars ( 102 )

$2,149.95

$4,449.95

Summit Racing™ Valve Springs

Valve springs are one of the most critical and overlooked components in your engine. They must be matched to your cam in order for the engine to reach its full potential. Summit Racing™ springs are made from high quality steel with precision winding and surface treatments. Special consideration for reduced valvespring and retainer mass ensures stability at high rpm. This reduces valve float, extends the rpm range, and greatly reduces valvetrain wear.

4.8 out of 5 stars ( 30 )

$71.99

Summit Racing™ Pro LS Crankshafts

Summit Racing™ Pro LS forged steel crankshafts deliver industry-leading fit, finish, and durability at an affordable price. Order the model recommended for your year/make and engine application. Check out the long list of premium features: * 4340 forged steel * Tested to over 1,200 hp in boosted applications * Core hardened to optimum strength, then tempered to remove stresses * Nitride hardened, which results in less distortion, excellent case depth, and more fatigue life * Profiled counterweights reduce windage * Precision stroke and indexing * Lightening holes are drilled in the rod journals for quicker engine acceleration * Gun-drilled Main Journals for quicker engine acceleration * Each crank is magnetic particle tested to ensure it's free of flaws * Large radius fillets for increased strength, narrowed rod bearings for reduced friction * Straight shot oiling for maximum lubrication just prior to maximum load angle * Maximum journal tolerances of +/- .0001 in. ensure consistent bearing clearance * Micro-polished journals with chamfered oil holes for maximum durability and bearing life * Optimized counterweight placement for reduced twisting at high RPM and ease of balancing * High-quality reluctor rings are installed with precision fixturing * Extra 3/16 in. front keyway for blower cars

4.58 out of 5 stars ( 12 )

$839.99

BluePrint Engines Chevy LS 376 C.I.D. 530 HP EFI Retrofit Dressed Long Block Crate Engines

BluePrint Engines Chevy LS 376 c.i.d. 530 hp EFI Retrofit dressed long blocks are for those wanting maximum horsepower and durability. Every BluePrint engine is dyno-tested for proven results and is backed by their exclusive 30-month/50,000-mile warranty. Specs and components for the Chevy LS 376 crate engines include: * New GM 6.2L block * Nodular iron rotating assembly * Forged connecting rods * Hypereutectic pistons * Aluminum cylinder heads -- 68cc chamber -- 2.165 in. intake/1.600 in. exhaust valves * Roller camshaft -- .612 intake/.585 exhaust lift -- 225 intake/238 exhaust duration at .050 -- 113 degree lobe separation * Compression ratio 10.7:1 * LS3 intake manifold * Fuel injection included * Coil packs * Oil pan * Valve covers * Timing cover * Water pump * Harmonic balancer * Spark plugs and wires

4.83 out of 5 stars ( 6 )

$11,149.00

On Sale

Summit Racing™ Forged Crankshafts

Summit Racing™ forged crankshafts offer maximum strength and the best value for your dollar! Our crankshafts are non-twist forged from certified 4340 steel. They are put through several stages of heat-treatment, and then stress-relieved and shot-peened to provide the strength and reliability you demand for your high performance application. Each journal is micro-polished and a .125 in. radius is used for increased strength. Summit Racing™ forged crankshafts help you get the most in value and performance.

4.1 out of 5 stars ( 10 )

$1,019.99


$949.99

$1,099.99

AFR 260cc LS3 Mongoose Cylinder Heads

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.

5.0 out of 5 stars ( 5 )

$3,490.20

Chevrolet Performance LSX 454 Long Block Crate Engines

Chevrolet Performance LSX 454 long block crate engines are built with an all-forged, super-tough rotating assembly and feature a pair of new deep-breathing LSX 6-bolt cylinder heads. They also come dressed with great looking, all-new orange powdercoated valve covers with an engraved LSX 454 logo. With a carburetor and high-flow Chevrolet Performance intake manifold (sold separately), these engines are good for about 627 hp and 586 lbs.-ft. of torque. Due to the number of application variations, the LSX 454 crate engines do not include an oil pan, and the valve covers do not include provisions for mounting the ignition coil brackets. Other specifications include: * 4.185 in. bore * 4.125 in. stroke * Cast iron LSX Series block with cross-bolted 6-bolt main caps * Forged steel crankshaft * Forged steel connecting rods * Forged aluminum 11.0:1 compression pistons * Hydraulic roller camshaft * 0.635 in. lift intake/0.635 in. lift exhaust, 236 intake/246 exhaust duration at .050 in. lift * Aluminum LSX-LS7 cylinder heads with 70cc chambers * 1.8:1 aluminum roller rocker arms * 58-tooth reluctor wheel

4.0 out of 5 stars ( 1 )

$16,836.20

Summit Racing™ LS Lifter Valley Covers

Summit Racing™ LS lifter valley covers are race-ready! Manufactured from 1/4 in. thick billet aluminum or cast aluminum. They are available in a plain, polished, black anodized, or copper finish for both gen 3 and 4 versions. Plus, they're etched with the Summit Racing™ logo for a high-tech look! Replace that factory cover with Summit Racing™ LS lifter valley covers.

4.39 out of 5 stars ( 23 )

$59.99

$99.99

Chevrolet Performance LSX376 Crate Engines

You're track-ready with extreme performance GM LSX376 crate engines. At home on the street and on the strip, these value-driven Chevrolet Performance crate engines offer lower-compression forged aluminum pistons, a tough bottom end, and high-flow heads. LSX376 engines make a perfect foundation for supercharging, turbocharging, and nitrous--all you need to do is supply the boost! Does your muscle deserve the LSX touch? Yes! Get the strength and power to build a winner with these features: * Race-bred LSX Bowtie block * High-flow LS3 cylinder heads * Blower-friendly 9.0:1 forged pistons * 14 in. automatic transmission flexplate * Unique LSX376 valve covers

Not Yet Reviewed

$13,568.04

BluePrint Engines Pro Series Chevy LS 376 C.I.D. 530 HP EFI Base Dressed Long Block Crate Engines

BluePrint Engines provides a Dyno Promise with results and bragging rights. They make sure they hit their target horsepower and proper torque with every crate engine, utilizing an advanced computerized balancer to get rotating assemblies within 2 grams, ensuring silky smooth power over the entire rpm range. According to BluePrint, that's precisely why their engines sound and run better than the competitors. Accompanying your BluePrint Engines Pro Series Chevy LS 376 c.i.d. 530 hp EFI base dressed long block crate engine will be a comprehensive, dyno-generated printout showing its critical specs. No more guessing what the real-world peak horsepower and torque ratings are. Any doubters in the crowd? Simply flash them your dyno results! These long block engines are available with or without complete engine controller with ECU, harness, throttle pedal, and sensors. Select the one you want. BluePrint Engines Pro Series Chevy LS EFI base dressed engine: * Horsepower and torque: 530hp/495 lb.-ft. * Compression ratio: 10.7:1 * BluePrint Engines LS3 aluminum cylinder heads -- 69cc chamber -- 2.165 in. intake/1.590 in. exhaust valves -- 259cc intake/102cc exhaust runners * Hydraulic roller camshaft: -- .612 intake/.585 exhaust lift -- 225 intake/238 exhaust duration at .050 in. -- 113-degree lobe separation angle -- 3-bolt cam * Nodular iron crankshaft -- 3.622 in. stroke -- 6.125 in. connecting rods with 150,000 psi bolts * Hypereutectic pistons * BluePrint Engines high-strength cast iron 6.2L block -- Increased deck thickness and strength webbing -- Extended cylinder skirt -- Priority main oiling -- 4.0662 in. bore -- 6-bolt main -- 1-piece rear main seal -- Improved water jacket design -- Utilizes OEM LS3 front and rear covers * LS swap oil pan * Harmonic balancer (Short Corvette style) * DBW throttle body * Available with a GM plastic or fabricated intake manifold * Fuel injectors and rail * Coil packs * Spark plugs and wires * Water pump

5.0 out of 5 stars ( 1 )

$9,849.00

$11,749.00

Callies Compstar Crankshafts

You're installing value without compromising quality with Callies Compstar crankshafts. Finished and inspected by Callies, Compstar cranks maintain proper geometry and design. Hardened with deep nitride, They're ideal for all types of abusive racing environments and available in a wide variety of strokes and journal sizes to fit most common cubic inch requirements. All rod journals are drilled and counterweights are profiled for piston clearance. Sometimes you need to race within a budget, but with Callies' consistent grind and polish, as well as their precise stroke and index, you don't need to compromise on quality. Choose Callies Compstar crankshafts--they're better by design.

4.6 out of 5 stars ( 10 )

$1,167.00

Summit Racing™ Main Bearings

These Summit Racing™ main bearings are just what you need to freshen up your engine. Why? They use silicon aluminum bi-metal construction. Silicon aluminum is the choice for many of today's engine manufacturers because of its high fatigue strength and superior temperature threshold. Bearing wear is dramatically reduced and the fatigue strength is greatly improved.

4.82 out of 5 stars ( 96 )

$54.99

$89.99

ATK High Performance Chevy LQ4 6.0L 460 HP Long Block Crate Engines

ATK High Performance Chevy LQ4 6.0L 460 hp long block crate engines lay down impressive power that can be run with factory fuel injection or retrofitted with a carburetor. They're hand-built, balanced, and blueprinted using top-quality parts. Don't waste time trying to salvage a high-mileage short block when you can get a fresh mill that's ready for your choice of components to make it your own. ATK Chevy LQ4 6.0L 460 hp long block crate engines include: * Handpicked and seasoned 6-bolt main block * Aligned and honed main bores * OE steel crankshaft * 3.622 in. stroke * OE connecting rods * Hypereutectic dish top pistons * Aluminum cylinder heads * Hydraulic roller camshaft * Timing chain and gear set * 1.7:1 ratio rocker arms * 24-tooth reluctor

4.4 out of 5 stars ( 10 )

$5,049.99

Summit Racing™ Oil Pumps

Don't waste time installing a generic oil pump when you can get a high-quality Summit Racing™ pump that's ready to go. The high volume pumps deliver 20-25 percent more oil than the standard volume pumps, and are pressure-tested and hand-turned to guarantee performance. Available in iron and nodular iron for most applications.

4.64 out of 5 stars ( 184 )

$81.99

Summit Racing™ Oil Filter Relocation Kits

These Summit Racing™ remote oil filter kits include a bypass adapter, filter mount, 8 ft. of oil hose, barb fittings, stainless steel hose clamps, mounting hardware, and instructions. These kits require a Fram PH8A or equivalent oil filter, which is not included.

3.95 out of 5 stars ( 188 )

$60.99

$74.99

March Performance Chevy LS Series Serpentine Kits

March Performance Chevy LS Series serpentine kits offer an exciting new look when mounting an accessory drive in your vehicle. They're designed for vehicles that do not have air conditioning. The driver side features a remote power steering pump with an attractive aluminum cover, while the passenger side has March's own billet alternator (except where noted). An OEM-style tensioner ensures perfect belt tension. All pulleys and brackets are CNC-machined from 6061-T6 aluminum for strength and perfect fit—and hard-coated on high wear areas for durability. Order the kit recommended for your vehicle. LS Series kits include: * Aluminum water pump * March billet alternator (except where noted) * Alternator pulley with fan * Water pump pulley with nose cover * Alternator bracket * Polished spring-loaded belt tensioner with cover * Crank pulley (required adapter sold separately) * Mounting hardware Kits with power steering include: * Type 2 remote power steering pump * Billet pump case * Power steering pulley with nose cover * Mounting hardware

5.0 out of 5 stars ( 1 )

$1,336.99

$1,694.99

Eagle Street and Strip Rotating Assemblies

Eagle Street and Strip rotating assemblies consist of name-brand quality components for a wide range of engines at an affordable price. These kits feature a crankshaft, pistons, piston rings, rod and main bearings, and connecting rods. Based on your application, balanced assemblies are also available. Order the model designed for fitment on your year/make vehicle and engine application.

4.43 out of 5 stars ( 87 )

$2,736.99

BluePrint Engines Pro Series Chevy LS 427 C.I.D. 605 HP EFI Base Dressed Long Block Crate Engines

BluePrint Engines provides a Dyno Promise with results and bragging rights. They make sure they hit their target horsepower and proper torque with every crate engine, utilizing an advanced computerized balancer to get rotating assemblies within 2 grams, ensuring silky smooth power over the entire rpm range. According to BluePrint, that's precisely why their engines sound and run better than the competitors. Accompanying your BluePrint Engines Pro Series Chevy LS 427 c.i.d. 605 hp EFI base dressed long block crate engine will be a comprehensive, dyno-generated printout showing its critical specs. No more guessing what the real-world peak horsepower and torque ratings are. Any doubters in the crowd? Simply flash them your dyno results! These long block engines are available with or without LS engine controller package with wiring harness and gas pedal. Select the one you want. BluePrint Engines Pro Series Chevy LS EFI base dressed engine: * Horsepower and torque: 605 hp/565 lb.-ft. * Compression ratio: 11:1 * BluePrint Engines LS3 aluminum cylinder heads -- 69cc chamber -- 2.165 in. intake/1.590 in. exhaust valves -- 259cc intake/102cc exhaust runners * Hydraulic roller camshaft: -- .624 intake/.624 exhaust lift -- 239 intake/255 exhaust duration at .050 in. -- 114-degree lobe separation angle -- 3-bolt cam * Forged steel crankshaft -- 4.125 in. stroke -- 6.125 in. connecting rods * Forged pistons * BluePrint Engines high-strength cast iron 6.2L block -- Increased deck thickness and strength webbing -- Extended cylinder skirt -- Priority main oiling -- 4.0685 in. bore -- 6-bolt main -- 1-piece rear main seal -- Improved water jacket design -- Utilizes OEM LS3 front and rear covers * LS swap oil pan * Harmonic balancer * DBW throttle body * Available with a GM plastic or fabricated intake manifold * #42 fuel injectors and returnless fuel rail * Coil packs * Spark plugs and wires * Valve covers * Timing cover

Not Yet Reviewed

$12,849.00

$15,049.00

Dart SHP Special High Performance LS Next Pro Cast Iron Bare Blocks

Dart SHP Special High Performance LS Next Pro cast iron bare blocks continue the evolution of their LS Next platform with superior strength. With full skirt designs, priority oiling systems, and other excellent features, these SHP LS Next Pro blocks are the perfect upgrades for your factory LS blocks, as well as ideal starting points for drag racers, circle track competitors, off-roaders, and high performance marine enthusiasts. Dart SHP LS Next Pro cast iron bare blocks feature: * Superior strength 220 BHN cast iron * Steel 4-bolt main caps with upgraded ARP main studs * Lifter oil crossover with restrictor provision * 6-bolt per cylinder capability * 4.000 in. up to 4.185 in. bore * Factory oil filter provision * 8-counterweight machining * Full skirt design * Priority main oiling * Siamese cylinder bores * Thick decks ensure reliable head gasket seal

5.0 out of 5 stars ( 1 )

$4,699.99

Billet Specialties Tru Trac Serpentine Systems with A/C

Billet Specialties Tru Trac serpentine systems with A/C feature easy, straightforward assembly—with no spacers or washers to fool with. The entire Tru Trac systems are designed to mount to the engine block to allow for any cylinder head/intake configuration. All hardware and fasteners are included in each kit to complete the install. Tru Trac serpentine systems with A/C include: * Powermaster 170 amp 1-wire alternator * Billet aluminum alternator fan and pulley * Edelbrock water pump * Billet aluminum water pump pulley * Billet aluminum bridge bracket * Patent-pending billet aluminum tensioner engineered specifically for each Tru Trac serpentine system * Billet aluminum tensioner pulley * Billet aluminum crankshaft pulley * Polished ARP 12-point stainless steel fasteners * Goodyear Gatorback 6-rib serpentine belt * Comprehensive installation manual * Polished Sanden SD-7 A/C compressor * Polished billet aluminum A/C compressor clutch cover * Polished billet aluminum A/C compressor manifold

4.6 out of 5 stars ( 20 )

$2,999.95

AFR 230cc LSX Mongoose Strip Cylinder Heads

Recommended for aggressive street/strip builds with displacements up to 427 c.i. operating at or below 7200 rpm. Capable of flowing 328 cfm at 0.650 in. lift with a 4.000 in. bore size. AFR street legal 230cc LS1 Mongoose strip cylinder heads are specifically designed for Gen III Chevy Corvettes, Camaros, and trucks. LSX cylinder heads offer unmatched flow performance and feature 2.080 in. intake and 1.600 in. exhaust valves with their ductile iron interlocking valve seats. Mongoose strip heads are available with 62cc, 65cc, and 72cc combustion chambers. Structural features like AFR's trademark 3/4 in. thick head deck, a must for blown and nitrous applications, reinforced rocker stud bosses, and thick wall runners provide unparalleled durability. An exclusive new modern combination chamber design with a double quench pad area helps the LSX generate huge low and mid-lift airflow numbers.

4.71 out of 5 stars ( 7 )

$3,332.70

Callies Magnum Crankshafts

Race smart with Magnum durable competition crankshafts from Callies. Manufactured from ultra-pure AISI 4340 steel, these cranks are subjected to multiple heat treatments, giving them unsurpassed wear and strength characteristics. With their gundrilled mains and fully profiled counterweights, you may choose from an available selection for a variety of engine types. You just can't beat the proven reliability and value of Callies Magnum crankshafts.

5.0 out of 5 stars ( 2 )

$3,721.00

BluePrint Engines Pro Series Chevy LS 427 C.I.D. 625 HP EFI Drop-In Base Long Block Crate Engines

Swap out your powerplant with one of these BluePrint Engines Pro Series Chevy LS 427 c.i.d. EFI drop-in base long block crate engines. They put down an impressive 625 hp and 565 lbs.-ft. of torque! Featuring a 30-month/50,000-mile warranty, they're the perfect choice for drivable and reliable high-end performance. Additionally, BluePrint Pro Series Chevy 427 c.i.d. dressed long block crate engine assemblies are manufactured under strict tolerances and provide outstanding, consistent results. They include a 58X Gen IV reluctor wheel and sensors. Long block crate engine features include: * New GM LS engine block * 4340 forged 4.125 in. stroke crankshaft * 4340 forged 6.125 in. long connecting rods * Forged pistons * 11.0:1 compression * Hydraulic roller camshaft, .624 in. lift intake, .624 in. lift exhaust, 239 intake/255 exhaust duration @ .050 in. lift, with 114 degree lobe separation * Aluminum GM LS cylinder heads * Single roller timing chain * GM LS intake manifold * Full roller rocker arms * ECM Controlled (not included - customer must reprogram)

Not Yet Reviewed

$12,949.00

Callies Apex Crankshafts

Utilizing the latest in computer aided solid modeling and CNC machining centers, Callies offers the best designed, highest quality crankshafts, connecting rods, and camshaft inventory available on the market today. Callies understands not everyone has the need or budget for a Magnum or billet crankshaft, but still may want a product with more to offer than their Compstar line. Callies went to work for a solution, which culminated in the creation of their Apex Series of crankshafts. The Apex crankshafts are made on the same forgings that Callies uses to make their Magnum Series but are machined by the supplier that makes the Compstar line. Like Compstar, the Apex crankshafts are finish sized and fully inspected in-house. This results in the best bang-for-your-buck crankshaft on the market. Callies takes pride in staying ahead of the competition with the latest high tech design and manufacturing advantages of their products. Callies Apex LS/LT standard features include: * Made on Callies proprietary Magnum forging * Ultra-pure, premium 4340 material machined by Callies vetted and reliable Compstar supplier * Machined by Callies vetted and reliable Compstar supplier * Nitrided for optimal hardness and wear resistance * Every crankshaft is finished and inspected in-house at Callies Limited stroke and pin size combinations * Limited stroke and pin size combinations

Not Yet Reviewed

$2,493.00

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