The noise is overrated. I was running open o2 with a lot of port work done to the various exhaust components and the noise didn't really bother me. Went WOT past many cops without any trouble. I put a 3" cat-elim downpipe on the car right before I grenaded the tranny and it got louder on the inside, more noise transmitted into the cabin. It still wasn't what I'd consider overly loud. Turbos make great mufflers.