WSM Piston Kit - Polaris - +.50 mm 50-305-05PK Speedster 909 Exhaust System Chassis constructed from a blend

Chassis constructed from a blend of poly-fabric and stretch softshell for comfort

Quick-release strap connection

Full Shorty System Race

Shells are highly perforated for maximum breathability and air ventilation

WSM Piston Kit - Polaris - +.50 mm 50-305-05PK Speedster 909 Exhaust System Chassis constructed from a blendQuality and construction that meets or exceeds OEM Feature improved E clip design Contain piston, rings, pin and clips Additional rings available separately Order one per cylinder Skirts have a nonabrasive, expansion retarding MOS2 coating to reduce heat and friction for added power and longevity MOS2 coating actually draws heat through piston walls and out the bottom Specially hardened tops add strength to ring grooves