After i gut my cat should i put a piece of pipe (2 1/2 or 2/ 1/4?) in there or should i just leave it hollow? If i do put a pipe in there will that help lessen the sound? what to do with A.I.R.? By the way i ordered a 3" cat back from Edelbrock.

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late model 91 rs
fully loaded t-tops
red leather
paint- gm red and yellow blend (light red)
custom pink rims
305 tbi 14"x3" O.E,
computer chip, accel super stock plug wires
MTX sub and amp (very loud)
vic_v8@yahoo.com

 

What about drilling a hole in the inserted pipe so that the A.I.R is doing something not just "looking pretty" (I've had dates with girls like that, look pretty but do nothing)

 

I would just run a pipe through the cat. This should help flow immensely over a gutted cat. Exhaust can't get "trapped" in the cat then, like it would in a gutted cat. Don't even bother drilling that hole unless you have some serious emission problems. Just my 2 cents worth.

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1984 Camaro Sport Coupe - 73K Miles, 5.0 Carbed LG4, COMPLETELY stock except for a K&N Air Filter, F41 Suspension Package, 700R4 Tranny, 3.08 Open Rear End, New Paint
Best 1/4 Mile Run:
16.760 @ 80.74 MPH

Coming Soon:
Modified 355 TPI
Headers
3" Exhaust
Aluminum Drive Shaft
3.27 Disc Brake Posi Rear

 

CamaroX84 is right the exhaust flow will slow greatly due to the increased diameter of the cat housing and hurt performance. Put a pipe through it and it will be fine.