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3 inch

  1. 4.6L Tech
    Hello I have an issue with my (11674) on my mustang GT. When I had my exhaust installed the installer welded my catback to my to the catalytic converter x-pipe (was spliced into my stock h-pipe). Now I want to upgrade my system to an off road x-pipe from magnaflow but I cant because its a 3...
  2. 5.0L Tech
    Has anyone installed/or have installed the 3" Flowmaster kit? I really want to do this but I h ave a 2.5" Amercan Thunder package on my car and I have a lot of trouble with the pipes "vibrating" against part of the body.