This ‘Grip & Rip’ kit includes Moly200 sleeves, Laps piston kit and Big Bore gasket set to modify the Polaris RZR 800cc to a 900cc quad. The kit requires a machinist to bore out the OEM cylinder, install sleeves, fit pistons and assemble. A standard break in period is to be expected after installation. The entire kit retails at $729.95.