Cryogenic hardened race R53/52 W11/W10 engine timing chain set for all MINI S 2002-2006 and convertible until 2008. Designed by Sneed4Speed for use in high performance track and race engines. Super strength Cryogenic hardened timing chain will not stretch like the stock chain. Kit also includes heavy duty plastic guides, steel gears and high strength tensioner, designed for track and race use but will still work on the street. These sets are standard equipment in all Sneed4Speed Super Sport and Race engines.