This main stud kit is supposed to be for the 1.8T engine used in VW & Audi. But it doesn't fit my 1.8T in the Audi TT MK1 even though they say it will. If you have question if it fits or not, measure your current main bolts. If they are over 90mm in length including the head (around 95mm), then these will not fit your engine. These studs are only 90mm and are too short even without the washer provided. If you need longer studs, get ARP 203-4204. They are 100mm long with the same diameter & thread. They fit my engine perfectly.