Well I just installed a JDM X-pipe with no cats this evening. Man my car sounded sick before and now FORGETABOUTIT!!!!It sounds awesome. Sounds somewhat the same when I start it or maybe I just didnt notice the difference because Im used to it being loud. But when I took A cruise down the block and hit the throttle a bit thats when I noticed a difference. I am very pleased with it. The pipe didnt take to long to install and it would have been easier if the people who installed my longtubes had put the collector pipes on correctly. Also the drivers side connection between the Collector pipe and x-pipe was a little off and required some elbow grease.But all In all its bad ass. I chose the x-pipe because my cats on the h-pipe would make an annoying rattle and they would also scrape on speed bumps. For anyone who is thinking of getting JDM longtubes I suggest getting it with the JDM x-pipe with no cats. Black03