I wonder if it would make a big difference. I would most likely leave it in for normal driving.
hmm… after looking again, i think the skunk2, tanabe, invidia, and greddy systems all look like they would be really really loud.
vibrant makes a nice stainless axelback
borla makes a cat back, but i cant only find pics of the axelback
and with the hayame i think there is a resonator on it too, to quiet it down a little more… and thats a cat back
and magnaflow makes a cat back…
so now i am between those 4 ^