Do you want it to be quieter? If you want it to sound good but a bit loud keep the flowmaster and ditch the resonator and muffler that are upstream from it.
'12 sparkly black S.
MS3 RMM, 2.5" catback to Flowmaster 80 muffler, K&N drop in w/newmission mod, LED corner bulbs, yellow headlight bulbs, bright LED reverse bulbs. Aftermarket door speakers, 10" subs.