Welcome to the Ford Mustang forum built for owners of the Mustang GT350, BOSS 302, GT500, and all other S550, S197, SN95, Fox Body and older Mustangs set up for open track days, road racing, and/or autocross. Join our forum, interact with others, share your build, and help us strengthen this community!
after (different dyno) headers with off road x-pipe and side exhaust on 93 octane (aed informed me it was pulling a lot of timing because the gas I was running was crap)