hey there, i am planning on getting the hooker cat back for my 305 firebird. i am gonna get a high flow cat for it aswell. should i go with a 2 1/2" cat to match what i have know. or go with a 3" to match the pipe included in the cat-back? or is there no difference as far as flow goes with both sizes?
thx

 

The cat is the one of the biggest bottle necks in the system. Get the 3in cat to match the 3in pipes of the cat back system. You will need a expander piece after your y-pipe and before your cat. This way if you ever want headers you will be all set, with no restrictions. Good luck

 

i have a full hooker exhaust. i love the sound, and it gave me a smooth sound when not getting on it. quite a diffrence in power to.

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(A.K.A FireBird88)
AOL SN: Zander0710
1992 Camaro RS 25th anniversary edition Adopted Feb,14 2000

Mods:
14x3 Open element w/ K&N filter, MSD 6a, MSD GM blaster Coil ,MSD 8.5 SC wires, AFPR,Fuel Pressure gauge(60Psi max), 3-Row Al rad. , 180* t-stat, Hooker 1 5/8 headers, 3" Catco cat, 3" Hooker Aero Chamber cat-back, "Ultimate TBI" mods

Best track
15.279@89.02MPH

 

Get the 3" cat if you're gonna spend any money on the cat.
Hey UnderDog, do you have any pix of that hooker cat-back on your car? I really want to see what those quad 3" tips look like on the back before I order the setup.