Please just put in a cat, make it a high flow, but put in a cat. The engineers at honda spent a lot of time to make that car run as efficiently and cleanly as possible, so for their sake and for everyone else's sake, run a cat, the gains are not worth the environmental losses. You will all probobaly call me a tree hugger now, but in 20 years when our children all have skin cancer, you'll run a cat.

-GSRacer