big red

whitch cat do i hollow out the main one if this is a dumb Q i am sorry

88rxn/a

iTrader: (6)

TII or N/A?
and if you got SMOG test's forget about passing if you do this

sar

iTrader: (1)

The dumbest statement or question in the world will not appear so if you fill it with proper and interesting grammar and vocabulary. I'm not saying I have either, but small things go a long way.

If you are hollowing out a cat you hollow out the main big one, closest to your seat area. But I would suggest hollowing out the precats as they'll cause more restriction than the main cat. Removing cats is illegal in 50 states. A straight pipe would create less turbulence and such. If you have an 86-88 make sure you have enough backpressure or a better way of actuating 5th and 6th ports.