Originally posted by LoCoZ2.0:
That is funny because in the Summit catalog it says the ultra flow has fiberglass(glass pack)in the muffler.




*cough* *cough* look on their site... EVERY dyno max has that so do alot of the magnaflow mufflers too basicly any straight through muffler has fiberglass in it.

2003 Subaru WRX some mods Even if you don't have the answer, you certainly have to admire the problem. aka ZetecRacing