Chambered mufflers are annoying period. H pipe or a prochamber with a Dynomax/Magnaflow/Borla/Bassanni is going to be nice and stealth at idle but noticible and scream like a mofo when you stomp on it.
2000 Mustang GT Steeda #0048 34k miles. 99 Cobra 4V swapped, FTBR IRS swapped, exhaust, tuned by James Gordon.
Just because I give you advice, doesn't mean I know more than you. Its just means I've done more stupid ****.