CP Pistons Forged Pistons Set +0.5mmWhether youre racing a Honda, Acura, Mitsubishi, Toyota, Nissan, or Subaru, CP Pistons has specially designed high performance pistons off the shelf. In most cases, these will directly replace the stock pistons. CP pistons are compatible with oversized valves and high lift camshafts. Part numbers ending in a X are on a X style forging for additional strength, durability and weight reduction. The X style has a full radius dome design, high performance