More then likely that type r cat is whats causing it to be so loud cause any evo's that I've heard aren't very loud but have a real nice deep sound to them, maybe try a carsound cat there suppose to be good but whether or not changing from the type r to the carsound will change anything is a good question. I personally love the sound of the ones I've heard and was gonna get that system myself but found it's played out and over priced for something that will eventually rust.