Originally Posted by AmericanMustang
I'm looking into an Xpipe for my car. I have Magnaflow mufflers now with stock pipes and I'm been told of a 15 hp increase. Have you experienced the power?
I'll have to run with the cats because of the sound. I really like the sound of my car-a nice suttle rumble until I hit about 4,ooo rpms. Your comments please.
I got ~22 out of long tube headers, catted-x and SLP LMs. 15 seems like it might be a stretch.