I have this paired with the jdl el catless headers , indivia down pipe and speedfactory cat back . It sounds nice not too raspy but definitely louder than stock . Overall it's really good quality the only issue was the fitment with the down pipe . This sat about 2 inches below where it needed to be so when you bolt it on you need someone to push it up while you screw in the nuts . On top of that you need to buy grimspeed exhaust gaskets for this because the ones it comes with are to thin and caused an exhaust leak on my set up .