Does not require cutting the piston top! For the PREDATOR 212cc This rod measures 3.595" with .490" wrist pin and is designed to be used with aftermarket high-performance pistons. Bearings and custom designed high tensile strength bolts are included. All of our rods are CNC machined from aircraft grade 7075 T-651 aluminum. Our OHV rods are designed to utilize the higher compression ratios and high RPMs of racing OHV engines. Key Features Include: Oil groove in the crank bore that is fed through a channel in the integrated dipper arm. Oil groove in the wrist pin bore that provides a reservoir of lubricant to the wrist pin. The standard bore on a Predator 212cc engine is 2.756". The Wiseco Piston #11132p94 is for a 2.756" bore, which means it will yield approximately .003" piston to wall clearance. This is right where you want to be, so provided your bore is good and needs nothing more than a fresh cross-hatch honing, it will be good. If your bore is larger, out-of-round, or the engine has already been run for a while with the stock piston, you will need to go with a larger piston. This kit comes complete with billet ARC rod, Wiseco forged piston, rings, circlips, and .490" wrist pin. This is the ultimate drop in piston/rod combination!