1 what is the inlet n outlet of the CAT on a 93 gs300
2 would it give more hp if i replace with a hedmann high performance CAT
3 what is that other thing that is between the CAT n the engine ,a resonator or precat
4 n does someone sell a pipe that replaces that thing if it provides hp n mpg or any other improvement
5 which mufflers provide extra hp without the noise
6 n is there an kits out there that have everthing im looking for ,cause exhaust is gonna have to be changed soon


would greatly appreciate the help n if u dont have anything nice to say dont say anything at all cause not everyone is as smart as u