WSM Piston Kit - Polaris 300 - +.50 mm 50-310-05PK Stella SMX-1R V2 Boots This system comes standard with

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

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

Two zippered hand pocket

The Flash Tune long awaited PUSH/PULL type sensor is now available

WSM Piston Kit - Polaris 300 - +.50 mm 50-310-05PK Stella SMX-1R V2 Boots This system comes standard withQuality 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