I put an H Pipe on my GT because historically, an X Pipe will add rasp to some or most muffler setups. It had a nice low faint burble with the stock mufflers.
Then I added the Borla S Type mufflers (got a sweet deal on them). Now the car is loud, deep, and burbly. Just how I wanted it. When I let off the gas and let the car roll, it sounds like thunder in the back end
nice low rumbling. No backfiring, drone, or anything. It is what I feel a muscle car should sound like.
Here is my thread with pics and sound clips: Exhaust finished on my GT
I ended up welding all of the piping together just to ensure it holds and doesn't move. Most people will just use the clamps or buy a full catback kit so no cutting is required. But people sell the stock exhaust catback system for so cheap it didn't bother me. I ended up spending about $600 for my exhaust setup. Half of what an aftermarket catback costs.
Was extremely busy this weekend but I hope to get more sound clips as the month progresses.