wondering if its worthed opening up the piping from stock 2.25" to 2.5" cat back system including sports muffler?
i have no plans for extractors since they cost the earth here in Perth. they have to be custom made, of course there are ones from RPW. but i've read some unpleasant things abt 'em from TGC.
Would 2.5" cat back system minus the extractor make a difference? is it worthed?
i dont care for the loud muffler sound.
thanks in advance.