Opening up your exhaust is a mod in itself. If you are trying to boost up performance, then yes you need to get rid of that restrictive stock exhaust! -Nick
"My family hauler can kick your family hauler's @SS!" ~~~~1999 Contour SE Sport~~~~ -KKM True Rev -Custom cat back Flowmaster exhaust -All Cat's fixed. -SHO Shop Off-Road Y-pipe -Many other Mod's done...