Originally Posted by TelePlayer
I need to change my Cat converter. The stock converter is huge, and I am wondering how much it acts like a muffler. I plan on replacing it with a very small converter from Random Technologies. Can anyone comment on how much louder my system might get with a new converter?
IMHO, the new convertor will be slightly louder, but maybe not for the reasons you think; it would probably sound louder because it'* new and clear, whereas your (12-year-old?) original convertor is probably at least a little corked-up by now.
I can tell you from experience that if the rest of the exhaust system isn't there, the difference in noise levels between a convertor only, and nothing at all, is the difference between Loud and D*mned Loud. So there'* some noise muffling ability, but your old one is doing more of that than your new one will.