The worst thing that I did was remove the resonators and add the X-pipe. The x-pipe makes the drone flow throughout the cabin but it does reduce the rasp and drone and the exhaust is no longer heard from the back of the car but more throughout the interior. I picked up a stock V-8 catback and had the MRT's welded to it. I was glad to scrap the resonated x-pipe and installed the V-8 catback. I think the biggest problem is removing the resonators. If I were you, i'd pick up a V-8 catback and weld the MRT's to it. You'd want the V-8 catback especially if plan to add LT's.
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