JUST GOT THE KOOKS HEADERS AND JDM H-PIPE with Cats. My new is exhaust is now KOOKS headers, JDM h-pipe w/cats, and borla stingers. All I have say WOW. Even my dad is a little nervous about sound laws. I went to the shop and he drove the cobra and I was behind him in the van and mannnnnnnnnnnn is it cool. I mean IT IS LOUD. Sounds quiet at idle and like the stinger but with more bass, with no boost but once the whipple kicks in it is crazy. Also I had to go get dinner and my dad was on the front deck a he said he can hear loud and clear on the main roads at WOT where with the stingers we were a ghost's wisper.