I read a comment on the forum that BMW R & D has done their job in tuning our BMW's for performance and there is not much one can do to improve on that, except to bring back performance that was there in the first place.
My question on this is: how do tuning shops and houses like Nowack, Hamann, Rob Green and Savspeed then stay in business?
Are they just that good in selling a big hoax?
My question on this is: how do tuning shops and houses like Nowack, Hamann, Rob Green and Savspeed then stay in business?
Are they just that good in selling a big hoax?