678cc / 2mm Overbore Piston Kit: These are the new forging that is as light as the stock OEM stock bore pistons. This is a 2mm over kit, includes pistons, coating, rings, lighter wrist pins, cir clips. The compression is 12.5 to 1.At the forefront of performance, piston manufacturing has been a result of continuous research and development of unique materials, piston designs and technologies. Utilizing State of the Art CNC machines for manufacturing, along with purpose-designed forgings, while being able to maintain exacting specifications on each and every piston – holding tolerances to millionths of an inch.
2007/2018 you will need to Bore and re-plate your cylinders