Racers Choice Refers to Pistons Packed With Performance Enhancements, to Produce the Maximum Power Possible Out of Each Application. Most of the Racers Choice Pistons Are Single Ring 2-Stroke or Two Ring 4-Stroke Pistons. With One Less Ring, Weight and Friction Are Reduced, Power Is Increased, and Throttle Response Is Instantaneous! Racers Choice Pistons Offer Extra Performance to Those Racers and Engine Builders Who Want the Most in Every Race. Note: Service Intervals May Be Increased With Racers Choice Pistons Over Conventional Wiseco Pistons, and Are for Expert Racers and Tuners Only.

• This Is a Replacement for a Single Piston, Does Not Replace Entire Set.
• Dedicated Forging.
• Superior Strength/weight Ratio Utilizing Aerospace Alloy.
• Race Proven Designs.
• Chosen by Top Race Teams, in All Forms of Racing
• CNC MacHined Cam Shape & Profile for Peak HP and Service Life.
• Premium Top End Needle Bearing.
• Precision MacHined Highest Quality Materials for Strength and Reduced Friction.
• Includes High-Performance Ring Set.
• Extended Life and Sustained Power.
• Includes Highest Quality Alloy Wrist Pin.
• Includes Circlip.
• Consistently True and Durable.
• Bore Size (Mm): 65.5
• Long Rod ( 5mm).
• For Twin Cylinder.
• Liquid Cooled.
• Must Use With Long Rod Crank.

• Please Note: The Image Displayed Is Representative of the Piston, However Circlips, Wristpins & Rings, as Well as the Specific Type of Piston Will Vary Based on Your Model.