I experienced NO H.P. loss, and thats what I was worried about when I decided on getting it. If I lost 9-10 H.p. , I am pretty sure I'd feel it. As far as avoiding the Dynomax kit?
It sounds bad @$$! 3-4k is the best sounding. IMO Ps- I'm not arguing or anything, just statin' what I know.
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1998 Mustang GT
Mods -K&N Airfilter- -Classic Design Concepts Side Exit Exhaust-