Large rubber seal/gasket that fits between the transmission tunnel pressing and the transmission tunnel apeture cover (either metal or plastic/foam versions) on most of the 105 series range. Fitted to Sprint GT, GTV, GTC & GTA models, all Roundtail and Kammtail Spiders to 1982 and all Saloons. Also possibly fitted to later Spiders and GTVs, but it is unclear from both the parts books and practical experience as there does not seem to be a consistent fitment. May also be used on some 750 and 101 series cars as well.