Muffler question- flowmaster vs. ?

Sorry for resurrecting this thread but this sounds freaking amazing! Info in car and exhaust please :thumbsup:

Just a mild 340 - 9.6 SCR, RHS heads, hydraulic flat tappet 231 @ .050" .561" w/ 1.6's 108 LSA, Dougs headers w/ 2.5" pipes - no cross over.