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  • Close-up of a shiny metal engine piston with multiple ring grooves and a black skirt featuring a logo on the side.
    SKU: K626M8525AP

    Professional Series forged racing pistons from Wiseco are no-expense-spared pistons designed for the serious racers and builders. Packed full of custom-level performance and durability features and provided with premium rings, Professional Series pistons are designed and built for use in heavy to severe duty race builds. Remove your limits with Wiseco?s Professional Series.
    Wiseco Mitsubishi 4G63 Piston Set, 85.25 mm Bore, 35.00 mm Compression Height, 0.866 in. Pin Diameter, Sport Compact, Set of 4.

    • Engineered, forged, and machined in the USA from 2618 aluminum for improved tensile strength
    • Precision ring grooves, anti-detonation groove, and additional ring seal improving features
    • ArmorGlide Skirt Coating: seizure resistant, friction reduction, and quieter operation
    • Designed and built to withstand heavy to severe duty performance applications
    • Fully machined crown features
    • Forced pin oiling
  • Wiseco 1400 HD Mitsu EVO 8 - 4G63 Turbo -14cc Piston Shelf Stock
    SKU: 6626M86AP

    Professional Series forged racing pistons from Wiseco are no-expense-spared pistons designed for the serious racers and builders. Packed full of custom-level performance and durability features and provided with premium rings, Professional Series pistons are designed and built for use in heavy to severe duty race builds. Remove your limits with Wiseco?s Professional Series.
    Wiseco Mitsubishi 4G63 Piston, 86.00 mm Bore, 35.00 mm Compression Height, 0.866 in. Pin Diameter, Sport Compact, Set of 1.

    • Engineered, forged, and machined in the USA from 2618 aluminum for improved tensile strength
    • Precision ring grooves, anti-detonation groove, and additional ring seal improving features
    • ArmorGlide Skirt Coating: seizure resistant, friction reduction, and quieter operation
    • Designed and built to withstand heavy to severe duty performance applications
    • Fully machined crown features
    • Forced pin oiling
  • Close-up of a shiny automotive piston, showing the crown, grooves, and black base with a logo II (engine component).
    SKU: K626M865AP

    Professional Series forged racing pistons from Wiseco are no-expense-spared pistons designed for the serious racers and builders. Packed full of custom-level performance and durability features and provided with premium rings, Professional Series pistons are designed and built for use in heavy to severe duty race builds. Remove your limits with Wiseco?s Professional Series.
    Wiseco Mitsubishi 4G63 Piston Set, 86.50 mm Bore, 35.00 mm Compression Height, 0.866 in. Pin Diameter, Sport Compact, Set of 4.

    • Engineered, forged, and machined in the USA from 2618 aluminum for improved tensile strength
    • Precision ring grooves, anti-detonation groove, and additional ring seal improving features
    • ArmorGlide Skirt Coating: seizure resistant, friction reduction, and quieter operation
    • Designed and built to withstand heavy to severe duty performance applications
    • Fully machined crown features
    • Forced pin oiling
  • Wiseco 1400 HD Mitsu EVO 8 - 4G63 Turbo -21cc Piston Shelf Stock
    SKU: 6627M87

    Professional Series forged racing pistons from Wiseco are no-expense-spared pistons designed for the serious racers and builders. Packed full of custom-level performance and durability features and provided with premium rings, Professional Series pistons are designed and built for use in heavy to severe duty race builds. Remove your limits with Wiseco?s Professional Series.
    Wiseco Mitsubishi 4G63 Piston, 87.00 mm Bore, 28.70 mm Compression Height, 0.866 in. Pin Diameter, Sport Compact, Set of 1.

    • Engineered, forged, and machined in the USA from 2618 aluminum for improved tensile strength
    • Precision ring grooves, anti-detonation groove, and additional ring seal improving features
    • ArmorGlide Skirt Coating: seizure resistant, friction reduction, and quieter operation
    • Designed and built to withstand heavy to severe duty performance applications
    • Fully machined crown features
    • Forced pin oiling
  • Close-up of a metal piston and connecting mechanism inside a circular housing, with a spring-like element at the center and '310' stamped on the left side.
    SKU: K627M85AP

    Professional Series forged racing pistons from Wiseco are no-expense-spared pistons designed for the serious racers and builders. Packed full of custom-level performance and durability features and provided with premium rings, Professional Series pistons are designed and built for use in heavy to severe duty race builds. Remove your limits with Wiseco?s Professional Series.
    Wiseco Mitsubishi 4G63 Piston Set, 85.00 mm Bore, 28.87 mm Compression Height, 0.866 in. Pin Diameter, Sport Compact, Set of 4.

    • Engineered, forged, and machined in the USA from 2618 aluminum for improved tensile strength
    • Precision ring grooves, anti-detonation groove, and additional ring seal improving features
    • ArmorGlide Skirt Coating: seizure resistant, friction reduction, and quieter operation
    • Designed and built to withstand heavy to severe duty performance applications
    • Fully machined crown features
    • Forced pin oiling
  • Wiseco 1400 HD Mitsubishi Evo 8 - 4G63 Turbo -21cc Piston Shelf Stock Kit
    SKU: K627M86

    Professional Series forged racing pistons from Wiseco are no-expense-spared pistons designed for the serious racers and builders. Packed full of custom-level performance and durability features and provided with premium rings, Professional Series pistons are designed and built for use in heavy to severe duty race builds. Remove your limits with Wiseco?s Professional Series.
    Wiseco Mitsubishi 4G63 Piston Set, 86.00 mm Bore, 28.70 mm Compression Height, 0.8661 in. Pin Diameter, Sport Compact, Set of 4.

    • Engineered, forged, and machined in the USA from 2618 aluminum for improved tensile strength
    • Precision ring grooves, anti-detonation groove, and additional ring seal improving features
    • ArmorGlide Skirt Coating: seizure resistant, friction reduction, and quieter operation
    • Designed and built to withstand heavy to severe duty performance applications
    • Fully machined crown features
    • Forced pin oiling
  • Wiseco 15-21 Can Am 450/850 Outlander/Renegade Piston Kit
    SKU: 40288M09400

    The Wiseco team has remained at the forefront of powersports performance through every era and evolution, including the development of high-performance 4-strokes. Today, Wiseco’s forged 4-stroke pistons are designed for each specific engine application and built to the tightest tolerances for the ultimate combination of performance and strength. Proven at every level of riding, Wiseco 4-stroke pistons are ready to deliver the power and reliability you’re looking for.
    94.00 mm Bore – 10.5:1 CR

    • Complete Package: Each piston includes a wrist pin, rings, and circlips, providing everything needed for installation
    • Forged Material: Optimizes strength and service life, ensuring durability under high-stress conditions
    • Performance-Enhancing Features: Varied across applications to maximize both durability and power
    • Improved tensile strength of forged material optimizes strength and service life
    • Designed and built for each specific 4-stroke powersports engine
    • Dedicated forgings allow for optimized strength-to-weight ratio
    • Includes high-quality piston rings, wrist pin(s), and circlips
    • Engineered, forged, and machined in the USA in Mentor, OH
    • 94.00 mm Bore
  • Wiseco 16-18 Yamaha YZ250F 14:1 CR Piston Kit
    SKU: 40155M07700

    The Wiseco team has remained at the forefront of powersports performance through every era and evolution, including the development of high-performance 4-strokes. Today, Wiseco’s forged 4-stroke pistons are designed for each specific engine application and built to the tightest tolerances for the ultimate combination of performance and strength. Proven at every level of riding, Wiseco 4-stroke pistons are ready to deliver the power and reliability you’re looking for.
    77.00 mm Bore – 14:1 CR

    • Improved tensile strength of forged material optimizes strength and service life
    • Designed and built for each specific 4-stroke powersports engine
    • Dedicated forgings allow for optimized strength-to-weight ratio
    • Includes high-quality piston rings, wrist pin(s), and circlips
    • Engineered, forged, and machined in the USA in Mentor, OH
    • 77.00 mm Bore, 14:1 CR
  • Wiseco 16-18 Yamaha YZ250F Garage Buddy 13.51 CR Crankshaft
    SKU: PWR216-101

    Wiseco’s Garage Buddy Complete Engine Rebuild Kits helps save time and money, whether you are working on a dirt bike, UTV or ATV. Available for a wide variety of popular powersports applications, the Complete Engine Rebuild Kits help make powersports engine maintenance hassle-free. The kit includes – A complete crankshaft assembly and OEM-quality main bearings, all necessary gaskets, seals, and O-rings, Wiseco forged piston kit(s) including necessary piston components, Small-end bearing (for two-stroke motorcycle applications), and an hour meter and assembly lube. Covered under 90-day/10-hour warranty against manufacturer defects, the Complete Engine Rebuild Kits give you everything you need for a quick and efficient rebuild.
    Wiseco, Garage Buddy Complete Engine Rebuild Kit, 77.00 mm Bore, 13.5:1 CR

    • Complete crankshaft with precision machined crank webs for ultimate strength and durability and copper-plated, heat-treated, shot-peened connecting to remove residual stress and smooth surface blends
    • Precision-machined rotating and reciprocating rebuild kit – includes all top and bottom-end components for a complete engine rebuild!
    • Free Wiseco hour meter and bracket included to track maintenance intervals
    • Quality forged piston kit includes rings, wrist pin, and circlips
    • Also includes complete top and bottom end gasket kits
    • Covered under 90-day/10-hour limited warranty
  • Wiseco 18-19 Yamaha YZ450F Racers Elite 14:1 CR Piston
    SKU: RE818M09700

    The Wiseco team has remained at the forefront of powersports performance through every era and evolution, including the development of high-performance 4-strokes. Today, Wiseco’s forged 4-stroke pistons are designed for each specific engine application and built to the tightest tolerances for the ultimate combination of performance and strength. Proven at every level of riding, Wiseco 4-stroke pistons are ready to deliver the power and reliability you’re looking for.
    97.00 mm Bore – 14:1 CR

    • Improved tensile strength of forged material optimizes strength and service life
    • Designed and built for each specific 4-stroke powersports engine
    • Dedicated forgings allow for optimized strength-to-weight ratio
    • Includes high-quality piston rings, wrist pin(s), and circlips
    • Engineered, forged, and machined in the USA in Mentor, OH
  • Wiseco 2007 Suzuki RM-Z450 Steel Valve Kit
    SKU: SVK3407-E

    Wiseco valvetrain components have riders and racers covered from stock rebuilds to race engines. Titanium valves, Garage Buddy steel valve kits, cam chains, and valve shims help set you up for four-stroke head rebuild success.
    Wiseco, Steel Valve Kit, RM-Z450 ’07

    • Garage Buddy valve kits offer a more convenient and affordable replacement kit for titanium valve equipped models
    • Precision machined to exacting tolerances and quality inspected for OEM+ fit and function
    • Valve components manufactured by leading and trusted suppliers
    • Shim kits, individual titanium valves, and more available!
    • Shim kits, individual titanium valves, and more available
  • Wiseco 2007 Suzuki RM-Z450 Steel Valve Kit
    SKU: SVK3407-I

    Wiseco valvetrain components have riders and racers covered from stock rebuilds to race engines. Titanium valves, Garage Buddy steel valve kits, cam chains, and valve shims help set you up for four-stroke head rebuild success.
    Wiseco, Steel Valve Kit, RM-Z450 ’07

    • Garage Buddy valve kits offer a more convenient and affordable replacement kit for titanium valve equipped models
    • Precision machined to exacting tolerances and quality inspected for OEM+ fit and function
    • Valve components manufactured by leading and trusted suppliers
    • Shim kits, individual titanium valves, and more available!
    • Shim kits, individual titanium valves, and more available
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