I'm pretty sure it'll work on your rex...it sits like an oem muffler would with a 90degree bend to a tip. I run it with the greddy header and a test pipe and it's pretty quiet....it's got a resonator in the cat back piping...I'm waiting for my dad to get home with the cam and I'll snap some for ya....I hate lifting a lowered car like that...have to use the crank jack then the floor jack then a jack stand....then wood blocks! WTF...I need a truck!