So started off well at York dragway today in my classic wrx my best time was 13.2 wich was better than last time where I got 14.5 but last run I got a strange noise thought all way home it's the crank totally gutted got home to billingham and no change in noise to had a route around turns out iv ripped a manifold stud out iv never been sooo over the moon so see a bolt torn out of a head lol so drill and tap kit out tomorro if anyone done this before any hints or tips ??