PSI's 800 Big Bore has proven itself to be the most reliable Big Bore Kit on the market. The torque king has arrived!! Enough torque to push you over the top of the biggest mountain and over 162 horsepower to send you smokin' down the trail!! This kit with custom PSI 800cc Big Bore Twin Pipes delivers the most torque and horsepower out of this twin-period!! The kit consists of having the PSI machinists bore and re-nikasil your stock cylinders, a Stage V port job, 2 custom piston kits, a custom billet head, 2 billet chambers, and all the gaskets needed to reassemble your new found horsepower!! Don't be a "wannabe" - be a winner with PSI!! No case mod is necessary. Just send 2 cylinders. Does require Big Bore Pipes - Call with Application ...... $675.00