Thinking of reducing my down pipe from 3" to 2.5" where it passes the propshaft, using something like this http://www.ebay.com/itm/Vibrant-2-5...f8088cc&pid=100005&rk=2&rkt=2&sd=201418236259, then going back to 3", as it is constantly rubbing and is really starting to annoy the sh!7 out of me. I have had a few exhaust places try and fix it but to no avail.
Question is will this hinder performance, how much of a restriction is it likely to cause?
Question is will this hinder performance, how much of a restriction is it likely to cause?