right ive recently put some 17inch alloys on the car some clown has put one tyre on the wrong way round (must of been sniffing glue or something) so i need change that and the car judders when i hit 60-70mph not a lot but you can feel it with the original wheels on i got 100mph no problem i got these new wheels on it struggled and struggled and i think just stopped at 85mph but i had 2 FAT m8s in the car :yum: can the tracking reduce speed or out like that? and would a focus induction kit increase speed and how much are we talking (speed) a few hp?