Sweet
That sound alot like my dual side exit(until my cams switch)
Then it gets obnoxious.
Mine is only temporary,while I am building my new 3" system.
I just picked up 2 of those same 5" round magnaflows.
I am going 3" full exhaust ,though.I am trying to make it as quiet as possible
I took them to a local exhaust shop and had them weld both together,end to end.Then I had them put a flange on one end to bolt up to my header(no cat)
After seeing that the 6" round ,36" long res.fits.(as per xxtokesxx thread)
I had them make the whole assembly 36" long
I am not sure what muffler I am gonna use,but I am thinking about the black stealth vibrant,if it will fit on an nx.