i recently put Mac Catted Prochamber on my car( catted for inspection purposes) and i have flowmaster 40's. BUT i still want it 2 be louder but legal.. should i look into getting an slp loudmouth? or just deal with what i got?

 

if you got MAC catback to match that mac x pipe itll be pretty loud. My buddy has it and i have it (but i have LT's so its really loud) and his is nice.