Porsche Nickies Sleeves & Piston Set including Rings Pins & Clips 911 92861810705 Sierra Madre Collection is an ASTLS 14 1783 Sierra Madre Collection is an approved distributor and exclusive in the state of California Porsche Crush sleeve for rear wheel bearing fits 911 w Turbo Look option (1984 1989) and 930 (1976 1989) our Porsche 911 996 997 GT3 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 Paired with a set of custom forged 2618 alloy JE Pistons