Why not just have Fabspeed weld in their X-pipe? You coudl save your X pipe and just have it reinstalled..... The Fabspeed X-pipe is freer flowing since there are no cats and resonators, and the pipe is not squished and flattened like the BMW pipe. I was under my car yesterday (we installed the AA pulley) and I noticed a lot of flattened areas in the stock X.
Originally Posted by J08M3
I figure if I cut the secondaries out nice and neat and save them, worst that can happen is I decide to weld them back in. I will still be at only a fraction of an aftermarket bolt on system. I'm gonna have to search for a video camera so I can get before and after clips for everyone.