When going fro a 6 to an 8, the exhaust is definitely going to be louder. If you ever come to St. Louis, just don't be around mine when I start it. wide open BOSS side exhaust and Flowmaster Outlaws in back. Definitely will wake you up. lol
2013 GT 6 spd, GT500 mufflers, BOSS quad exhaust, Roush CAI, Barton shifter & 2 post bracket
CS GT-40 Wheels, Hotchkis sway bars, upper and lower control arms, springs (1.1/1.6 drop) and adj panhard bar KONI yellow struts and shocks J&M caster/camber plates,
BMR Upper control arm mount and lower control arm brackets.