what silvaman said is right.
Catbacks wont add performance.
Just buy mufflers if you want a different sound, but in truth all grand prix exhaust sounds terrible. (except gxp, cuz v8)
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what silvaman said is right.
Catbacks wont add performance.
Just buy mufflers if you want a different sound, but in truth all grand prix exhaust sounds terrible. (except gxp, cuz v8)
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