whats up guys. i have a 94 gsr 4dr with a itr exhuast made to fit. now im thinking i want to get some sort of catback so would i have to get one for the itr or just get one that would fit the gsr? also i know im gonna have to modify whatever i get some since they dont make many exhausts for the 4dr gsr. does anyone know what would be involved in the way of modification? i dont wanna spend alot of $ just to have to spend more to get it to work right. if its a hassle i will just keep my setup now.