If you own a 1993 - 1998 Toyota Supra Twin Turbo and love pushing your car to the limit, this piston set is for you. Whether you're hitting the track or just cruising on the highway, these pistons will give your engine a power boost. They have an 86.5mm bore with an additional.5mm oversized design and an 8.5:1 dish piston. Made from strong 2618 alloy forgings and featuring premium wrist pins, they're built to last and perform great.