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 99

PRW Rocker Arm Adjuster Screws 9531807

ADJUSTER SCREW KIT, VALVE LASH, MOPAR/CHRYSLER 273-440, Set of 16, 4135 Cup End

Part Number: PQX-9531807

4.0 out of 5 stars ( 4 )

Estimated Ship Date: Today

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PRW Cylinder Head Stud Kits 1040301

Cylinder Head Stud, 4135 Steel, 12-Point Nuts, Chevy, GMC, 6.6L/400, Diesel, LB-7, LLY, LBZ,LMM,LML, Kit

Part Number: PQX-1040301

Not Yet Reviewed

Estimated Ship Date: Today

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Quadboss - Crankshaft Bearings and Bushings for 2018 YFM700 GRIZZLY EPS, 2017-2018 YFM700K KODIAK EPS - 414135

QBOSS CRANKSHAFT BEARING KIT

Part Number: QDB-41-4135

Not Yet Reviewed

Estimated Ship Date: Apr 24, 2026 if ordered today

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Estimated Ship Date: Apr 24, 2026 if ordered today

Earl's Performance Harmonic Balancer Bolts DBT-004ERL

Harmonic Balancer Bolts, 12-point Head, 4135 Chromoly, Black Oxide, 4.330 in. Underhead Length, Chevrolet, Small Block LS, Each

Part Number: EAR-DBT-004ERL

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Today

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Engine Works Harmonic Balancer Bolts 41350

Harmonic Balancer Bolt, Steel, External Hex, 2.250 Underhead Length, Chevy, Small Block, Each

Part Number: EW1-41350

Not Yet Reviewed

Estimated Ship Date: Today

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PRW Billet Steel Main Girdles 9034700

Main Cap Girdle, 1045 Billet Steel, Stroker Clearance, Black Oxide Finish, with PRW SCM-4135 Hardware, Ford, 302W, Each

Part Number: PQX-9034700

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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PRW Power Rocker Arm Shaft Hold-Down Kits 1203023

Rocker Arm Shaft Hold-Down Kits,FORD 302-351W, Rocker Arm Fastener Kit for PRW 333020x Series rocker system, 4135 Alloy Steel

Part Number: PQX-1203023

Not Yet Reviewed

Estimated Ship Date: Jun 10, 2026 if ordered today

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Estimated Ship Date: Jun 10, 2026 if ordered today

Wiseco 4-Stroke Piston Rings 4135VM

4.135" x 1.2 x 1.2 x 2.0mm Rin

Part Number: WIS-4135VM

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

Wiseco Piston Rings 4135GFX

105.03mm (4.135") Auto Ring Set- 1 cyl.

Part Number: WIS-4135GFX

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

PRW Main Girdle Stud Kits 1000202

FORD 302 Main Girdle Stud Kit, 4135 ChromolyPRW Steel Studs, Includes 10ea 1/2" Longer Studs, 7/16"-14/20 x 4.80" Studs, Nuts & Washers.

Part Number: PQX-1000202

Not Yet Reviewed

Estimated Ship Date: Jun 9, 2026 if ordered today

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Estimated Ship Date: Jun 9, 2026 if ordered today

PRW Valve Cover Fasteners 4135010

Valve Cover Bolt Kit

Part Number: PQX-4135010

Not Yet Reviewed

Estimated Ship Date: Jun 10, 2026 if ordered today

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Estimated Ship Date: Jun 10, 2026 if ordered today

PRW Power Valve Cover Fasteners 4135020

Valve Cover Bolt Kit

Part Number: PQX-4135020

Not Yet Reviewed

Estimated Ship Date: Jun 10, 2026 if ordered today

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Estimated Ship Date: Jun 10, 2026 if ordered today

PRW Valve Cover Fasteners 4135030

Valve Cover Bolt Kit

Part Number: PQX-4135030

Not Yet Reviewed

Estimated Ship Date: Jun 10, 2026 if ordered today

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Estimated Ship Date: Jun 10, 2026 if ordered today

Wiseco 4-Stroke Piston Rings 4135VZ

4.135" Ring Set - .043"x1.2x2.

Part Number: WIS-4135VZ

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

PRW Cylinder Head Stud Kits 1035131

Cylinder Head Fasteners, Studs, 4135 Chromoly Steel, 200,000 PSI Tensile Strength, Black Oxide, 12-Point, Ford, 351W, Kit

Part Number: PQX-1035131

Not Yet Reviewed

Estimated Ship Date: Jun 10, 2026 if ordered today

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Estimated Ship Date: Jun 10, 2026 if ordered today

Need It Sooner? We recommend these similar substitute parts:

ARP High Performance Series Cylinder Head Bolt Kits 154-3603

4.75 out of 5 stars ( 65 )

Estimated Ship Date: Today

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PRW Valve Cover Fasteners 4135100

Valve Cover Bolt Kit

Part Number: PQX-4135100

Not Yet Reviewed

Estimated Ship Date: Today

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PRW Valve Cover Fasteners 4135027

Valve Cover Fasteners, Bolts, 1/4 in.-20, 3.6 in. Long, for Chevy Small Block Bolt Pattern Cylinder Heads, Circle Track, Black Finish, Set of 8

Part Number: PQX-4135027

Not Yet Reviewed

Estimated Ship Date: Jun 10, 2026 if ordered today

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Estimated Ship Date: Jun 10, 2026 if ordered today

PRW Valve Cover Fasteners 4135037

Valve Cover Bolt Kit

Part Number: PQX-4135037

Not Yet Reviewed

Estimated Ship Date: Jun 9, 2026 if ordered today

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Estimated Ship Date: Jun 9, 2026 if ordered today

Mahle File Fit Rings 4135MS-1115

Piston Rings, File Fit, 4.130 in. Bore, Plasma-moly, 0.043 in., 1.5mm, 3.0mm, 8-Cylinder, 8 Sets

Part Number: MLE-4135MS-1115

Not Yet Reviewed

Estimated Ship Date: Apr 21, 2026 if ordered today

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Estimated Ship Date: Apr 21, 2026 if ordered today

Mahle Performance Piston Rings 4135MS-15

Piston Rings, Performance Series, 4.130 in. Bore, File Fit, 1.5mm, 1.5mm, 3.0mm, 8-Cylinder, Set

Part Number: MLE-4135MS-15

Not Yet Reviewed

Estimated Ship Date: Apr 21, 2026 if ordered today

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Estimated Ship Date: Apr 21, 2026 if ordered today

PRW Valve Cover Fasteners 4135000

Valve Cover Fasteners, Bolts, Steel, Chrome, Washers, Chevrolet, Small Block, Set of 8

Part Number: PQX-4135000

Not Yet Reviewed

Estimated Ship Date: Jun 10, 2026 if ordered today

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Estimated Ship Date: Jun 10, 2026 if ordered today

PRW Power Valve Cover Fasteners 4135047

Valve Cover Bolt Kit

Part Number: PQX-4135047

Not Yet Reviewed

Estimated Ship Date: Jun 9, 2026 if ordered today

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Estimated Ship Date: Jun 9, 2026 if ordered today

PRW Valve Cover Fasteners 4135007

Valve Cover Bolt Kit

Part Number: PQX-4135007

Not Yet Reviewed

Estimated Ship Date: Jun 9, 2026 if ordered today

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Estimated Ship Date: Jun 9, 2026 if ordered today

PRW Power Valve Cover Fasteners 4135040

Valve Cover Bolt Kit

Part Number: PQX-4135040

Not Yet Reviewed

Estimated Ship Date: Jun 9, 2026 if ordered today

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Estimated Ship Date: Jun 9, 2026 if ordered today

Engine Works Harmonic Balancer Bolts 41350PRO

HARMONIC BALANCER BOLT

Part Number: EW1-41350PRO

Not Yet Reviewed

Estimated Ship Date: Today

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