Engines & Engine Parts

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Welcome to your headquarters for horsepower—the place to get everything you need to build real power and performance! We’ve got competition-proven crate engines, performance-matched...

Welcome to your headquarters for horsepower—the place to get everything you need to build real power and performance! We’ve got competition-proven crate engines, performance-matched top end kits, and complete rotating assemblies from the biggest names in the industry. You can add a set of high-flow cylinder heads to your powerplant, upgrade your valvetrain, improve your oiling system, or drop in a new set of pistons. We also have a complete selection of crankshafts, connecting rods, harmonic balancers, pulleys, and engine brackets. We even have everything you need to restore the horsepower that time has stolen from your...

Showing All Items, Including Not in Stock Items That Match "1003"

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Results 1 - 25 of 197

Dura-Bond Valve Spring Shims 1003

Valve Spring Shims - K-1 Shim .015 Thickness

Part Number: DUR-1003

Not Yet Reviewed

Estimated Ship Date: Apr 28, 2026 if ordered today

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Estimated Ship Date: Apr 28, 2026 if ordered today

Clear View Filtration Engine Oil Accumulator Replacement Parts 1003

Replacement Seal Kit for Mega Prime

Part Number: BCN-1003

Not Yet Reviewed

Estimated Ship Date: Tomorrow if ordered today

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Estimated Ship Date: Tomorrow if ordered today

ARP Cam Bolts 134-1003

ARP Cam Bolts 134-1003

Cam Bolt, High Performance, Chromoly, Hex Head, m8 x 1.25 mm, Chevy, LS Gen III, Set of 3

Part Number: ARP-134-1003

4.93 out of 5 stars ( 73 )

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

ARP Pro Series Cam Bolt Kits 256-1003

Cam Bolts, 12-point, 7mm x 1.00 Thread, 5.0L 4-Valve, Coyote, Ford, Set of 12

Part Number: ARP-256-1003

5.0 out of 5 stars ( 7 )

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

K&N Performance Gold Oil Filters HP-1003

Oil Filter, Performance Gold, Canister, 3.31 in. Tall, 2.69 in. Diameter, 3/4 in.-16 Thread, Anti-Drainback, Relief Valve, 11-17 psi, Each

Part Number: KNN-HP-1003

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

Turbosmart OPR T40 Oil Pressure Regulators TS-0801-1003

Oil Pressure Regulators, Sleeper, 40 psi, Stainless Steel, Black Top, -4 AN O-ring Female Threads, Each

Part Number: TBS-TS-0801-1003

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

Scorpion Race Series Rocker Arms SCP1003

Rocker Arms, Race Series, Full Roller, 1.6 Ratio, Aluminum, Blue, 7/16 in. Stud, Chevy, Small Block, Set of 16

Part Number: SCC-SCP1003

4.43 out of 5 stars ( 7 )

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

K&N Select Oil Filters SO-1003

Oil Filter, Select, Canister, Black, 3/4 in.-16 Thread, 2.69 in. Tall, 2.73 in. Diameter, Anti-Drainback, Bypass Relief, Each

Part Number: KNN-SO-1003

Not Yet Reviewed

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

Melling Timing Chain and Gear Sets TOPK-1003

TIMING SET WITH OIL PUMP

Part Number: MEL-TOPK-1003

Not Yet Reviewed

Estimated Ship Date: May 5, 2026 if ordered today

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Estimated Ship Date: May 5, 2026 if ordered today

Harland Sharp Original Roller Rockers 1003-1

Rocker Arm, 3/8 in. Stud Mount, Full Roller, Aluminum, 1.65 Ratio, Chevy, Small Block, Each

Part Number: CSP-1003-1

Not Yet Reviewed

Estimated Ship Date: Jun 5, 2026 if ordered today

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Estimated Ship Date: Jun 5, 2026 if ordered today

Dura-Bond Valve Spring Shims 1003-RP

Valve Spring Shims - K-1 Shim .015 Thickness

Part Number: DUR-1003-RP

Not Yet Reviewed

Estimated Ship Date: Apr 8, 2026 if ordered today

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Estimated Ship Date: Apr 8, 2026 if ordered today

Flowtech Alternator Brackets 10031FLT

Alternator Bracket, Steel, Natural, Header Mount, Short Water Pump, Chevy, Small Block, Each

Part Number: BIG-10031FLT

3.94 out of 5 stars ( 18 )

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

ARP Camshaft Tower Stud and Bolt Kits 107-1003

Camshaft Tower Stud and Bolt Kits, 8740 Chromoly, Black, 12-point Head, M8 x 1.25 Thread Size, Mitsubishi, 2.0L, 4G63 Engine, Kit

Part Number: ARP-107-1003

Not Yet Reviewed

Estimated Ship Date: May 4, 2026 if ordered today

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Estimated Ship Date: May 4, 2026 if ordered today

All Balls Racing Crankshaft Bearings and Seal Kits for 1987-2007 CR125R - 22-41003

Crankshaft Bearing and Seal Kit, Roller, for use on Honda®, Kit

Part Number: ALB-24-1003

Not Yet Reviewed

Estimated Ship Date: Apr 20, 2026 if ordered today

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Estimated Ship Date: Apr 20, 2026 if ordered today

ARP Camshaft Tower Stud and Bolt Kits 156-1003

Camshaft Tower Fasteners, ARP Camshaft Tower Stud and Bolt Kits, Stud, 12-Point, M6 x 1.0 Threads, Ford, Sold as a Kit

Part Number: ARP-156-1003

Not Yet Reviewed

Estimated Ship Date: Apr 13, 2026 if ordered today

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Estimated Ship Date: Apr 13, 2026 if ordered today

Turbosmart Billet Turbo Oil Feed Filters TS-0804-1003

Turbo Oil Feed Filter, -4 AN/ORB, Billet Aluminum, Black Anodized, Each

Part Number: TBS-TS-0804-1003

Not Yet Reviewed

Estimated Ship Date: May 13, 2026 if ordered today

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Estimated Ship Date: May 13, 2026 if ordered today

Dura-Bond Valve Spring Shims 1003-HP-RP

Valve Spring Shims - K-1 Shim .015 Thickness

Part Number: DUR-1003-HP-RP

Not Yet Reviewed

Estimated Ship Date: Apr 8, 2026 if ordered today

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Estimated Ship Date: Apr 8, 2026 if ordered today

ARP Camshaft Bolts 255-1003

BB Ford 6.2L V8 cam drive bolt kit

Part Number: ARP-255-1003

Not Yet Reviewed

Estimated Ship Date: May 4, 2026 if ordered today

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Estimated Ship Date: May 4, 2026 if ordered today

Kibblewhite Valve Springs for 1991-1992 GSX-R1100, 1986-1992 GSX-R750 - 60-1003

Valve Springs, Dual, 0.440 in. Maximum Lift, Suzuki, Set of 16

Part Number: KPM-60-1003

Not Yet Reviewed

Estimated Ship Date: Apr 15, 2026 if ordered today

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Estimated Ship Date: Apr 15, 2026 if ordered today

Dura-Bond Valve Spring Shims 1003-HP

Valve Spring Shims - K-1 Shim .015 Thickness

Part Number: DUR-1003-HP

Not Yet Reviewed

Estimated Ship Date: Apr 28, 2026 if ordered today

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Estimated Ship Date: Apr 28, 2026 if ordered today

Beck/Arnley Cylinder Head Fasteners 016-1003

Cylinder Head Fasteners, Bolt Style, Hex Head, Steel, Black, Volvo, 2.1L, 2.3L, Set of 10

Part Number: BCK-016-1003

Not Yet Reviewed

Estimated Ship Date: Apr 16, 2026 if ordered today

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Estimated Ship Date: Apr 16, 2026 if ordered today

ARP Water Pump Pulley Stud Kits 100-3203

Studs, Water Pump Pulley, Black Oxide, 5/16-24 in. Threads, 1.450 in. Length, Set of 4

Part Number: ARP-100-3203

5.0 out of 5 stars ( 4 )

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

ARP Camshaft Bolts 155-1003

BB Ford 6.2L V8 cam actuator bolt kit

Part Number: ARP-155-1003

Not Yet Reviewed

Estimated Ship Date: May 4, 2026 if ordered today

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Estimated Ship Date: May 4, 2026 if ordered today

Engine Works Billet Timing Pointers 100354

Timing Pointers, Billet Aluminum, Black Finish, 6.750 in. Damper, Adjustable 4 Degrees, Hardware included, Chevy, 262-400, Each

Part Number: EW1-100354

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

Pioneer Automotive Rocker Arms RA-1003

ROCKER ARM

Part Number: PIO-RA-1003

Not Yet Reviewed

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