If i am hurting it at all. I just put a 3 inch cat on my car to go along with the SLP headers and 3 inch catback. My question is, How bad is the cat gonna hurt my performance? I have to have one, because i have to pass emissions. thanks alot

------------------
*1989 RS
*Red, Daytona Turbo fiberglass hood, chrome 16x8 IROC wheels
*355 CID
*TPI ported plenum, SLP siamesed runners, Edelbrock high flow intake
*SLP 1 and 3/4 headers with 3 inch catback being installed next week
*Richmond 3.73, Auburn Posi
*Modded 700-R4, 2800 stall converter
*eibach pro kit and hotchkis sturt tower brace

 

Not that much to worry about, sounds like you have a good exhaust system and you said
EMISSIONS.

 

I think Chevy Hi Performance did a few dyno tests on the removal of cats, and at most they only gained like 5 HP and 7 ft-lbs of torque, sometimes not even that.

------------------
1992 Camaro RS (Auto) 5.0L TBI
-
Performance mods
NOS (125 HP shot), Dynomax cat-back exhaust, Hedman headers, no cat, custom high beam delete ram air w/ K&N, MSD 6A ignition, MSD 8.5mm plug wires, LT1 camshaft
Soon to be installed:
Edelbrock Perfomer TBI intake, B & M 2200 RPM stall torque converter, Trans Go shift kit, World Products Torquer heads, Ed Wright Fast Chip

Audio
Sony Xplod CDX-M610 head unit, Pioneer 2-way 4x6 front speakers, Pioneer 3-way 6x9 rear speakers, 12 inch Pioneer VCCS PRO subwoofer, QLogic sealed box, Kicker ZR360 amplifier, Lightning Audio 1 farad capacitor

Other
Macewen White Faced Gauges/Shift overlay, A-pillar gauges (Phantom oil pressure, Air/Fuel), 180* thermostat, Window Tint, chrome valve covers, xenon headlights

 

Well, i have the 3 inch cat on and i dont htink it is hurting performance too much. I got the 14 inch slip on version($46 with discount) and just welded it in place rather than paying over $100 for the big long obese one that is normally on them
thanks for the help

------------------
*1989 RS
*Red, Daytona Turbo fiberglass hood, chrome 16x8 IROC wheels
*355 CID
*TPI ported plenum, SLP siamesed runners, Edelbrock high flow intake
*SLP 1 and 3/4 headers with 3 inch catback *Richmond 3.73, Auburn Posi
*Modded 700-R4, 2800 stall converter
*eibach pro kit and hotchkis sturt tower brace