I like the MAC system on Hammer's car. It is not as loud as my Dynomax, mind you I have no Cats.
My exhaust system was the best mod (Ok, OK, it's like my only mod
), but it sounds cool and added performance to the car. I still have the factory headers, but I think I'll go long tubes after I get a different set of heads.
After trashing the cats and going with the Off road pipes, I don't know how much more performance I would see in changing my headers without changing heads, intake, etc.
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1995 Mustang GT