Okay what would give me a deep rumble exhaust sound either a 3 inch single pipe to a 3inch inlet flowmaster muffler with 2
2.5 out lets

or a
Hed man x pipe coming from the exhaust manifolds to the flowmaster thats got dual inltes and dual out lets.

i would like it to sound like the late 80's early 90's sad to say mustangs i love how they sound at idle and when they lay into it but i just cant seem to find any mustang owners i know that sound like that.