Why is everyone considering sticking a cat towards the end of the exhaust? Yes less efficient like it has been posted but why not just run without one instead of worrying about modifying an exhaust to put one in?
Is it emissions testing, visual inspection for you guys with states that require it?
Or the law saying you have to have one? No one is going to pull you over to check.
2012 Oxford White Focus Hatchback
Dyno #'s 164.35 HP 147.12 TQ