Porsche Nickies Sleeves & Piston Set including Rings Pins & Clips 911 108 100 1 SMC000985 1969 Hard This ARP kit features bolts 644 531 051 01 This ARP kit features bolts that are stronger (and reusable) and an upgrade of the factory stretch bolts for any build Only for use on models with original notch type sensors our Porsche 911 996 997TT Turbo 100mm Nickies nickel silicon carbide plated aluminum sleeves and matching piston sets are an alternative to expensive Genuine Porsche factory replacement cylinder and piston kits and are suitable for both street and track use Uses factory head gaskets and o rings and is designed as a direct replacement for the original Porsche parts