I have the catback and the Y pipe and I love it, going to be getting their test pipes soon, Its not loud at idle due to having a resonator in the muffler and in the mid pipe but you get a deep rumble which I personally like and when you get on it you can hear it the exhaust. Now when I installed mine I had clearance issues with the rear brace but I put 3 washers each on the 4 bolts and that took care of the clearance problem.
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