[LowMach]

I've been seeing headers + down pipes on ebay lately for like 200 shipped to your door.

uhm removing a restrictive item from the exhaust will have gains in hp and mileage.

especially if some mods have been to done to improve air into the motor.

get it in and get it out....

I was a 5.0 racer for years and saw stock cars 1/4 et's drop by 2 to 3 tenths just from hollowing cats or installing off-road pipes.

Man forget trying to hollow out the cat unless you have a respirator or something. You do not want to inhale the dust and crap thats going to come out of that thing do you?

my .02