WSM Piston Kit - Polaris 300 - +.50 mm 50-310-05PK Stella SMX-1R V2 Boots Accordion leather waist inserts provide

Accordion leather waist inserts provide close and comfortable fit

This system comes standard with a quiet insert that reduces sound (this can be removed to increase performance)

Stretch fabric construction for low weight and high levels of breathability

with an aggressive look & sound

durable and abrasion-resistance microfiber Air ventilation details on lateral quarter with mesh openings for breathability

WSM Piston Kit - Polaris 300 - +.50 mm 50-310-05PK Stella SMX-1R V2 Boots Accordion leather waist inserts provideQuality 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