Loud and stinky - 🤔. Sucked n pasty turns me on too. What can I say? I’m a sick bastard ha. What size are the collectors on our stock headers?Cats are fine to leave on the car unless you just like loud and stinky. Mine runs E85 most of the time through the stock exhaust including cats and runs 9.70s at over 140MPH in the 1/4.