Quote Originally Posted by matt5112 View Post
What year is it? 01+ run a cat.

Otherwise its up to you.

Apparently running without will cause your bumper to be discoloured near the tailpipes along with a different sort of smell you're probably used to.
Car is a '97 ( see New Improved Sig! ) and I guess I'm going cat delete and see how that goes. Any idea of the gains i will see with my combo? excited to get these on as I have'nt really driven the car for 6 months so it's new to me again, I forgot how much fun it is to drive.