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Summit Racing SpeedCard - learn how to get 10% back up to $100

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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...

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 daily driver.

Showing In Stock Items. Show All 165 Items.

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Results 1 - 25 of 139

aFe Magnum FLOW Pro 5R Air Filters 27-90203R

Made in the USA

aFe Magnum FLOW Pro 5R Air Filters 27-90203R

aFe Magnum FLOW Pro 5R Air Filters 27-90203R

Track Series Intake Replacement Air Filter w/ Pro 5R Media 4 IN F x (7-3/4 x 6-1/2) IN B x (5-3/4 x 3-3/4) IN T x 7 IN H

Part Number: AFE-27-90203R

Not Yet Reviewed

Estimated Ship Date: Jan 12, 2026 if ordered today

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Estimated Ship Date: Jan 12, 2026 if ordered today

Pro-X Racing Parts Valve Shims 29.748172.5

Pro-X Racing Parts Valve Shims 29.748172.5

Pro-X Racing Parts Valve Shims 29.748172.5

ProX Valve Shim 7.48 x 1.725 mm. (5 pcs.)

Part Number: PXR-29-748172-5

Not Yet Reviewed

Estimated Ship Date: Jan 5, 2026 if ordered today

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Estimated Ship Date: Jan 5, 2026 if ordered today

Pro-X Racing Parts Valve Shims 29.748177.5

Pro-X Racing Parts Valve Shims 29.748177.5

Pro-X Racing Parts Valve Shims 29.748177.5

ProX Valve Shim 7.48 x 1.775 mm. (5 pcs.)

Part Number: PXR-29-748177-5

Not Yet Reviewed

Estimated Ship Date: Jan 5, 2026 if ordered today

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Estimated Ship Date: Jan 5, 2026 if ordered today

Pro-X Racing Parts Valve Shims 29.748187.5

Pro-X Racing Parts Valve Shims 29.748187.5

Pro-X Racing Parts Valve Shims 29.748187.5

Valve Shims, 1.88mm Thickness, 7.48mm Diameter, for use on Honda®, Gas Gas, Husqvarna, Kawasaki, Sherco, Suzuki, Yamaha, Set of 5

Part Number: PXR-29-748187-5

Not Yet Reviewed

Estimated Ship Date: Jan 5, 2026 if ordered today

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Estimated Ship Date: Jan 5, 2026 if ordered today

Pro-X Racing Parts Valve Shims 29.748192.5

Pro-X Racing Parts Valve Shims 29.748192.5

Pro-X Racing Parts Valve Shims 29.748192.5

Valve Shims, 1.93mm Thickness, 7.48mm Diameter, for use on Honda®, Gas Gas, Husqvarna, Kawasaki, Sherco, Suzuki, Yamaha, Set of 5

Part Number: PXR-29-748192-5

Not Yet Reviewed

Estimated Ship Date: Jan 5, 2026 if ordered today

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Estimated Ship Date: Jan 5, 2026 if ordered today

Pro-X Racing Parts Valve Shims 29.890218

Pro-X Racing Parts Valve Shims 29.890218

Pro-X Racing Parts Valve Shims 29.890218

ProX Valve Shim KTM 8.90 x 2.18 mm. (5 pcs.)

Part Number: PXR-29-890218

Not Yet Reviewed

Estimated Ship Date: Jan 5, 2026 if ordered today

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Estimated Ship Date: Jan 5, 2026 if ordered today

Pro-X Racing Parts Valve Shims 29.748275

Pro-X Racing Parts Valve Shims 29.748275

Pro-X Racing Parts Valve Shims 29.748275

ProX Valve Shim 7.48 x 2.75 mm. (5 pcs.)

Part Number: PXR-29-748275

Not Yet Reviewed

Estimated Ship Date: Jan 2, 2026 if ordered today

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Estimated Ship Date: Jan 2, 2026 if ordered today

Pro-X Racing Parts Valve Shims 29.748280

Pro-X Racing Parts Valve Shims 29.748280

Pro-X Racing Parts Valve Shims 29.748280

ProX Valve Shim 7.48 x 2.80 mm. (5 pcs.)

Part Number: PXR-29-748280

Not Yet Reviewed

Estimated Ship Date: Jan 2, 2026 if ordered today

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Estimated Ship Date: Jan 2, 2026 if ordered today

Pro-X Racing Parts Valve Shims 29.748285

Pro-X Racing Parts Valve Shims 29.748285

Pro-X Racing Parts Valve Shims 29.748285

ProX Valve Shim 7.48 x 2.85 mm. (5 pcs.)

Part Number: PXR-29-748285

Not Yet Reviewed

Estimated Ship Date: Jan 2, 2026 if ordered today

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Estimated Ship Date: Jan 2, 2026 if ordered today

Pro-X Racing Parts Valve Shims 29.748290

Pro-X Racing Parts Valve Shims 29.748290

Pro-X Racing Parts Valve Shims 29.748290

ProX Valve Shim 7.48 x 2.90 mm. (5 pcs.)

Part Number: PXR-29-748290

Not Yet Reviewed

Estimated Ship Date: Jan 2, 2026 if ordered today

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Estimated Ship Date: Jan 2, 2026 if ordered today

Pro-X Racing Parts Valve Shims 29.890222

Pro-X Racing Parts Valve Shims 29.890222

Pro-X Racing Parts Valve Shims 29.890222

ProX Valve Shim KTM 8.90 x 2.22 mm. (5 pcs.)

Part Number: PXR-29-890222

Not Yet Reviewed

Estimated Ship Date: Jan 2, 2026 if ordered today

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Estimated Ship Date: Jan 2, 2026 if ordered today

Pro-X Racing Parts Valve Shims 29.890224

Pro-X Racing Parts Valve Shims 29.890224

Pro-X Racing Parts Valve Shims 29.890224

ProX Valve Shim KTM 8.90 x 2.24 mm. (5 pcs.)

Part Number: PXR-29-890224

Not Yet Reviewed

Estimated Ship Date: Jan 2, 2026 if ordered today

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Estimated Ship Date: Jan 2, 2026 if ordered today

Pro-X Racing Parts Valve Shims 29.748140

Pro-X Racing Parts Valve Shims 29.748140

Pro-X Racing Parts Valve Shims 29.748140

Valve Shims, 1.40mm Thickness, 7.48mm Diameter, for use on Honda®, Gas Gas, Husqvarna, Kawasaki, Sherco, Suzuki, Yamaha, Set of 5

Part Number: PXR-29-748140

Not Yet Reviewed

Estimated Ship Date: Jan 2, 2026 if ordered today

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Estimated Ship Date: Jan 2, 2026 if ordered today

Pro-X Racing Parts Valve Shims 29.748145

Pro-X Racing Parts Valve Shims 29.748145

Pro-X Racing Parts Valve Shims 29.748145

Valve Shims, 1.45mm Thickness, 7.48mm Diameter, for use on Honda®, Gas Gas, Husqvarna, Kawasaki, Sherco, Suzuki, Yamaha, Set of 5

Part Number: PXR-29-748145

Not Yet Reviewed

Estimated Ship Date: Jan 2, 2026 if ordered today

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Estimated Ship Date: Jan 2, 2026 if ordered today

Pro-X Racing Parts Valve Shims 29.748147.5

Pro-X Racing Parts Valve Shims 29.748147.5

Pro-X Racing Parts Valve Shims 29.748147.5

ProX Valve Shim 7.48 x 1.475 mm. (5 pcs.)

Part Number: PXR-29-748147-5

Not Yet Reviewed

Estimated Ship Date: Jan 2, 2026 if ordered today

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Estimated Ship Date: Jan 2, 2026 if ordered today

Pro-X Racing Parts Valve Shims 29.890210

Pro-X Racing Parts Valve Shims 29.890210

Pro-X Racing Parts Valve Shims 29.890210

ProX Valve Shim KTM 8.90 x 2.10 mm. (5 pcs.)

Part Number: PXR-29-890210

Not Yet Reviewed

Estimated Ship Date: Jan 2, 2026 if ordered today

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Estimated Ship Date: Jan 2, 2026 if ordered today

Pro-X Racing Parts Valve Shims 29.890234

Pro-X Racing Parts Valve Shims 29.890234

Pro-X Racing Parts Valve Shims 29.890234

ProX Valve Shim KTM 8.90 x 2.34 mm. (5 pcs.)

Part Number: PXR-29-890234

Not Yet Reviewed

Estimated Ship Date: Jan 2, 2026 if ordered today

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Estimated Ship Date: Jan 2, 2026 if ordered today

Pro-X Racing Parts Valve Shims 29.890238

Pro-X Racing Parts Valve Shims 29.890238

Pro-X Racing Parts Valve Shims 29.890238

ProX Valve Shim KTM 8.90 x 2.38 mm. (5 pcs.)

Part Number: PXR-29-890238

Not Yet Reviewed

Estimated Ship Date: Jan 2, 2026 if ordered today

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Estimated Ship Date: Jan 2, 2026 if ordered today

Pro-X Racing Parts Valve Shims 29.748150

Pro-X Racing Parts Valve Shims 29.748150

Pro-X Racing Parts Valve Shims 29.748150

Valve Shims, 1.50mm Thickness, 7.48mm Diameter, for use on Honda®, Gas Gas, Husqvarna, Kawasaki, Sherco, Suzuki, Yamaha, Set of 5

Part Number: PXR-29-748150

Not Yet Reviewed

Estimated Ship Date: Jan 2, 2026 if ordered today

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Estimated Ship Date: Jan 2, 2026 if ordered today

Pro-X Racing Parts Valve Shims 29.748152.5

Pro-X Racing Parts Valve Shims 29.748152.5

Pro-X Racing Parts Valve Shims 29.748152.5

Valve Shims, 1.53mm Thickness, 7.48mm Diameter, for use on Honda®, Gas Gas, Husqvarna, Kawasaki, Sherco, Suzuki, Yamaha, Set of 5

Part Number: PXR-29-748152-5

Not Yet Reviewed

Estimated Ship Date: Jan 2, 2026 if ordered today

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Estimated Ship Date: Jan 2, 2026 if ordered today

Pro-X Racing Parts Valve Shims 29.748155

Pro-X Racing Parts Valve Shims 29.748155

Pro-X Racing Parts Valve Shims 29.748155

Valve Shims, 1.55mm Thickness, 7.48mm Diameter, for use on Honda®, Gas Gas, Husqvarna, Kawasaki, Sherco, Suzuki, Yamaha, Set of 5

Part Number: PXR-29-748155

Not Yet Reviewed

Estimated Ship Date: Jan 2, 2026 if ordered today

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Estimated Ship Date: Jan 2, 2026 if ordered today

Pro-X Racing Parts Valve Shims 29.748160

Pro-X Racing Parts Valve Shims 29.748160

Pro-X Racing Parts Valve Shims 29.748160

ProX Valve Shim 7.48 x 1.60 mm. (5 pcs.)

Part Number: PXR-29-748160

Not Yet Reviewed

Estimated Ship Date: Jan 2, 2026 if ordered today

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Estimated Ship Date: Jan 2, 2026 if ordered today

Pro-X Racing Parts Valve Shims 29.748212.5

Pro-X Racing Parts Valve Shims 29.748212.5

Pro-X Racing Parts Valve Shims 29.748212.5

ProX Valve Shim 7.48 x 2.125 mm. (5 pcs.)

Part Number: PXR-29-748212-5

Not Yet Reviewed

Estimated Ship Date: Jan 2, 2026 if ordered today

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Estimated Ship Date: Jan 2, 2026 if ordered today

Pro-X Racing Parts Valve Shims 29.748215

Pro-X Racing Parts Valve Shims 29.748215

Pro-X Racing Parts Valve Shims 29.748215

ProX Valve Shim 7.48 x 2.15 mm. (5 pcs.)

Part Number: PXR-29-748215

Not Yet Reviewed

Estimated Ship Date: Jan 2, 2026 if ordered today

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Estimated Ship Date: Jan 2, 2026 if ordered today

Pro-X Racing Parts Valve Shims 29.748217.5

Pro-X Racing Parts Valve Shims 29.748217.5

Pro-X Racing Parts Valve Shims 29.748217.5

ProX Valve Shim 7.48 x 2.175 mm. (5 pcs.)

Part Number: PXR-29-748217-5

Not Yet Reviewed

Estimated Ship Date: Jan 2, 2026 if ordered today

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Estimated Ship Date: Jan 2, 2026 if ordered today

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