hey guys im checking out some housins there im intrested in and well one housins is from an S4 and the other is from an S5 if you look at the spark plug hols the S5 ones are lower than S4 because the S5 had the knock control sensor plug ontop of the plugs.... would it be ok to mix match the housins or what do you guys think???? need info quick
Thanks
TwEaK

 

stick with a match set of housings, the timing variances will cause idle issues.