Have a 5-speed 91 XR2, pretty much stock, went with 2.25" with a universal cat and a glasspack resonator that's about 20" long, with a dual chrome tip. Sounds pretty good, makes the car even a bit more "zippy" to drive. Also fitted a front strut tower bar, and that little motor is very entertaining to drive! Certainly a LOT more fun than a 1973 Porsche 914 1.7 I just picked up...what was I thinking, lol...