I'm currently running the Ford racing X pipe....sound wise It's great...I'm running it with Corsa mufflers and it's a nice combo. Quality wise I would have to say it's not the best out there. (you get what you pay for) When I received mine, the bends were not exactly right. The exit out of the X wasn't straight, so the pipes didn't line up staight. Made using the clamps a real pain, because they slide over each pipe. Plus, the ford racing X pipe ends were slightly smaller then the stock pipes. I know they are suppossed to be the same size, but it's as if the ford X pipe was pinched or slightly crimped when they made the pipe. Long story short, the clamps bottomed out before making a good tight seal around the pipe. I had to go to Pep Boys and buy two 2 1/2" bushings to take up the slack. All in all a pain in the ass for a supposed simple mod.