660 BIG BORE KIT FOR THE POLARIS 600

This trail package will produce 14 HP over a stock 600. The package consists of boring, porting, replating cylinders, head modifications, pistons, base porting & carb boring. The pistons used are a stock 700 piston that will need to be modified in the wrist pin area. We suggest using an aftermarket Dyno Port or SLP 600 single pipe with the kit.