I bought a exhaust system from a 2006 evo 9mr, its a 2.5". My question is when i get it fit for my 2003 oz rally will it be signifigantly louder than my stock exhuast because mine is like 1 3/4 or close to that? I hoping it will b a bit louder, any thoughts?

 

It might be a bit louder because it's a bigger pipe but that won't make it loud. It's still a stock muffler......your better off getting an aftermarket exhaust.

 

Ya, i thought that would b the case. Thanks

 

Cut the muffler off and be done

 

Haha well, he's driving a non-turbo engine and he actually needs the back pressure caused by the cat and muffler.....if he cuts off the muffler he'll actually loose HP.