The MK II was raced for years in saloon..very successfully. As Metalshapes pointed Combs sells much of whats needed to get a MK11..or S track able...if you are on that side of the ocean. Since these cars share the same engine as all XKs..up past E Types the DOHC 6 can be mod'ed to 350-400hp..Takes some good sized $$.. But even lightly modified these are quite capable sedans..great looking..handle exceptionally..and are comfortable cruisers.. If really interested..look here.. http://www.jaguarmk2.info/