[HiFlow5 0]

Depending on how your engine's tuned you can pass the sniffer test without cats. I had a friend who "forgot" to look under my car when doing the test and I passed with flying colors.

Most places you go to won't let you pull into the garage without them first looking under the car, cause if they get caught passing you without cats, their screwed! Plus when the see and hear a mustang pull up, there a little more thorough.