socks suck balls!
They look good too, if im still stuck for space I may look at these, what are you putting these on Danny?
Lol, ok what car the 205?
it's actually hard to say what is BEST. 30mm should be about right, but being really fussy and spending time experimenting with the distance (and mapping at the same time to see if there's imporvement) can get you nice extra torque, as the filter can work as a baffle