Engines & Engine Parts

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...

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Results 1 - 25 of 431

COMP Cams 1/2 in. Rocker Stud and Trunnion Retrofit Kits 13706-KIT

COMP Cams 1/2 in. Rocker Stud and Trunnion Retrofit Kits 13706-KIT

Rocker Arm Studs, Steel Alloy, 7/16-14 in. Base Thread, 1.75 in. Effective Stud Length, Kit

Part Number: CCA-13706-KIT

Not Yet Reviewed

Estimated Ship Date: Jun 19, 2026 if ordered today

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Estimated Ship Date: Jun 19, 2026 if ordered today

Summit Racing™ Pro Series Stainless Rocker Arms SUM-G6990

Rocker Arms, 1.5 Ratio, 3/8 in. Stud, Full Roller, Stainless Steel, Natural, Small Chevy, SBC, Set of 16

Part Number: SUM-G6990

4.72 out of 5 stars ( 18 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

S&S Cycle Shovelhead 80 in. 3 1/2 in. Bore Cylinder Kits 91-9024

66-84 BT 80in 3-1/2in Bore Cylinder and Standard Compression Piston Kit

Part Number: SSY-91-9024

Not Yet Reviewed

Estimated Ship Date: May 11, 2026 if ordered today

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Estimated Ship Date: May 11, 2026 if ordered today

Proform Mopar Licensed Valve Cover Fasteners 440-902

Valve Cover Fasteners, Wing Nuts, 1/4 in.20 Threads, 5 in. Tall, with 1 1/2 in. Long 1/4 in.-20 Studs, Chrome, Blue Mopar Emblem on Top, Set of 4

Part Number: PRO-440-902

Not Yet Reviewed

Estimated Ship Date: Today

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Proform Valve Cover Mini Nuts 141-759

Valve Cover Studs, with Mini Hex Nuts, Bowtie Emblem, Steel, Black Crinkle, 1/4 in.-20, 1.5 in. Length

Part Number: PRO-141-759

4.91 out of 5 stars ( 11 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

Proform Valve Cover Mini Nuts 141-909

Valve Cover Studs, with Mini Hex Nuts, Red Bowtie Emblem, Steel, Chrome, 1/4 in.-20, 1.5 in. Length, Set of 4

Part Number: PRO-141-909

4.5 out of 5 stars ( 12 )

Estimated Ship Date: Today

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Jesel Sportsman Series Shaft Rocker Arms KSS-335050+100

Dart, SB Aluminum Pro 1, 1.5 IN./1.5 EX.

Part Number: JES-KSS335050100

Not Yet Reviewed

Estimated Ship Date: Apr 29, 2026 if ordered today

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Estimated Ship Date: Apr 29, 2026 if ordered today

Proform Valve Cover Mini Nuts 141-601

Valve Cover Studs, with Mini Hex Nuts, Bowtie Emblem, Steel, Orange, 1/4 in.-20, 1.5 in. Length, Set of 4

Part Number: PRO-141-601

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Today

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ARP Pro Series Cylinder Head Studs 191-4001

Cylinder Head Studs, Pro Series, Hex Nuts, Pontiac, Iron Duke, 2.5L, 1/2 in., Kit

Part Number: ARP-191-4001

Not Yet Reviewed

Estimated Ship Date: Today

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Proform Valve Cover Mini Nuts 141-367

Valve Cover Studs, with Mini Hex Nuts, Bowtie Emblem, Steel, Metallic Gray, 1/4 in.-20, 1.5 in. Length

Part Number: PRO-141-367

4.0 out of 5 stars ( 3 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

COMP Cams Ultra Pro Magnum XD Roller Rocker Arms 1810-16

Rocker Arms, Ultra Pro Magnum XD Roller, Chromoly Steel, Black Oxide, 1.5 Ratio, 1/2 in. Stud Mounting, Chevrolet, Small Block, Set of 16

Part Number: CCA-1810-16

Not Yet Reviewed

Estimated Ship Date: Jun 19, 2026 if ordered today

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Estimated Ship Date: Jun 19, 2026 if ordered today

COMP Cams Ultra Pro Magnum XD Roller Rocker Arms 1810-1

Rocker Arms, Ultra Pro Magnum XD Roller, Chromoly Steel, Black Oxide, 1.5 Ratio, 1/2 in. Stud Mounting, Chevrolet, Small Block, Each

Part Number: CCA-1810-1

Not Yet Reviewed

Estimated Ship Date: Jun 19, 2026 if ordered today

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Estimated Ship Date: Jun 19, 2026 if ordered today

Chevrolet Performance Rocker Arm Studs 10044997

Rocker Arm Studs, Steel, 10mm x 1.5 Thread Bottom, 8mm x 1 Thread Top, Each

Part Number: NAL-10044997

Not Yet Reviewed

Estimated Ship Date: Aug 14, 2026 if ordered today

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Estimated Ship Date: Aug 14, 2026 if ordered today

ARP Pro Series Cylinder Head Studs 256-4302

Cylinder Head Fasteners, Pro Series Cylinder Head Studs, 12-point, M12 x 1.5 Thread Size, ARP2000, Black, Ford, 5.0L Modular, Kit

Part Number: ARP-256-4302

Not Yet Reviewed

Estimated Ship Date: Today

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ARP Pro Series Cylinder Head Studs 256-4304

Cylinder Head Fasteners, Pro Series Cylinder Head Studs, 12-point, M12 x 1.5 Thread Size, CA 625, Black, Ford, 5.0L Modular, Kit

Part Number: ARP-256-4304

Not Yet Reviewed

Estimated Ship Date: Today

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Crower Enduro Stainless Steel Stud Mount Roller Rocker Arms 73601NS-16

Rocker Arms, Enduro, Full Roller, 1.5 Ratio, 7/16 in Stud Size, Stainless Steel, Chevy, Small Block, Set of 16

Part Number: CRO-73601NS-16

Not Yet Reviewed

Estimated Ship Date: Jun 3, 2026 if ordered today

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Estimated Ship Date: Jun 3, 2026 if ordered today

ARP Pro Series Cylinder Head Studs 204-4101

Cylinder Head Studs, 12-point, ARP 2000, Black Oxide, 11mm x 1.5 Thread Size, Volkswagen, Kit

Part Number: ARP-204-4101

Not Yet Reviewed

Estimated Ship Date: May 27, 2026 if ordered today

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Estimated Ship Date: May 27, 2026 if ordered today

Crower Enduro Stainless Steel Stud Mount Roller Rocker Arms 73601-8

Rocker Arms, 7/16 in. Stud Mount, Full Roller, Aluminum, 1.5 Ratio, Chevy, Small Block, Set of 8

Part Number: CRO-73601-8

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Jun 3, 2026 if ordered today

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Estimated Ship Date: Jun 3, 2026 if ordered today

Crower Enduro Stainless Steel Centerline Stud Mount Roller Rocker Arms 73690-16

Rocker Arms, 7/16 in. Stud Mount, Full Roller, Stainless, 1.5 Ratio, Chevy, Small Block, Set of 16

Part Number: CRO-73690-16

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Jun 3, 2026 if ordered today

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Estimated Ship Date: Jun 3, 2026 if ordered today

Crower Stud Mount Late Model Rocker Arms 73602-16

Rocker Arms, 3/8 in. Stud Mount, Full Roller, Stainless Steel, 1.5 Ratio, Chevy, Small Block, Set of 16

Part Number: CRO-73602-16

Not Yet Reviewed

Estimated Ship Date: Jun 3, 2026 if ordered today

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Estimated Ship Date: Jun 3, 2026 if ordered today

Crower Enduro Stainless Steel Stud Mount Roller Rocker Arms 73600-1

Rocker Arm, 3/8 in. Stud Mount, Full Roller, Stainless Steel, 1.5 Ratio, Chevy, Small Block, Each

Part Number: CRO-73600-1

Not Yet Reviewed

Estimated Ship Date: Jun 3, 2026 if ordered today

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Estimated Ship Date: Jun 3, 2026 if ordered today

Crower Enduro Stainless Steel Stud Mount Roller Rocker Arms 73600-8

Rocker Arms, Enduro, Full Roller, 1.5 Ratio, 3/8 in. Stud Size, Stainless Steel, Chevy, Small Block, Set of 8

Part Number: CRO-73600-8

Not Yet Reviewed

Estimated Ship Date: Jun 3, 2026 if ordered today

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Estimated Ship Date: Jun 3, 2026 if ordered today

Crower Enduro Stainless Steel Centerline Stud Mount Roller Rocker Arms 73690-8

Rocker Arms, 7/16 in. Stud Mount, Full Roller, Stainless, 1.5 Ratio, Chevy, Small Block, Set of 8

Part Number: CRO-73690-8

Not Yet Reviewed

Estimated Ship Date: Jun 3, 2026 if ordered today

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Estimated Ship Date: Jun 3, 2026 if ordered today

ARP Pro Series Cylinder Head Studs 204-4102

Cylinder Head Studs, 12-point, ARP 2000, Black Oxide, 11mm x 1.5 Thread Size, Volkswagen, Kit

Part Number: ARP-204-4102

Not Yet Reviewed

Estimated Ship Date: May 22, 2026 if ordered today

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Estimated Ship Date: May 22, 2026 if ordered today

Crower Enduro Stainless Steel Stud Mount Roller Rocker Arms 73601-16

Rocker Arms, 7/16 in. Stud Mount, Full Roller, Stainless Steel, 1.5 Ratio, Chevy, Small Block, Set of 16

Part Number: CRO-73601-16

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Jun 3, 2026 if ordered today

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Estimated Ship Date: Jun 3, 2026 if ordered today

Crower Stud Mount Late Model Rocker Arms 73602-1

Rocker Arm, 3/8 in. Stud Mount, Full Roller, Stainless Steel, 1.5 Ratio, Chevy, Small Block, V6, Each

Part Number: CRO-73602-1

3.0 out of 5 stars ( 2 )

Estimated Ship Date: Jun 2, 2026 if ordered today

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Estimated Ship Date: Jun 2, 2026 if ordered today

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