I run Flowmaster Delta 50's after the x-pipe and they are right under my cab and I get nothing but compliments how quiet they are yet still sound like a performance exhaust unless you stand on it. I also have the remote QTC electric cut-outs for fun.. whole system is 3". I do have Dynamat and Dynaliner everywear but the 50's are right under the seat. The system dumps out in front of the rear wheels. I've had the 44's in a corvette and they were horrible and I had the 10's on a 5.4 and it was a trash can.. maybe give the Flow Delta 50's a chance. I will say the are very big and heavy..