Replacement cats - Pontiac G8 Forum: G8 Forums -
Exhaust Tech Headers, Catbacks, Mufflers, lack of mufflers

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post #1 of 3 (permalink) Old 03-20-2019, 08:39 AM Thread Starter
Blowerwhore's Avatar
Join Date: Mar 2019
Posts: 69
Replacement cats

How finicky are these GMs with aftermarket cats? I want to pass emmissions in my state of Pa. I have SLP long tube headers with the cats gutted out. I want to replace the system with new Catalytic converters. What do you recommend? The vehicle is a daily driver so it have more than 5000 miles a year so emissions will not get exempt.
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post #2 of 3 (permalink) Old 03-20-2019, 09:16 AM
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Join Date: Dec 2011
Posts: 1,344
Kooks Green cats have the best reputation. I have a set, but haven't put them on yet, so I can't give you a more personal opinion of them.
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post #3 of 3 (permalink) Old 03-20-2019, 09:30 AM
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Join Date: Sep 2018
Posts: 79
Solo High Flows are really good too.

2009 SRM G8 GT w/ Premium Package

Current Mods:

Solo Axle Back Exhaust w 3.5 Tips + GXP Rear Diffuser

Planned Mods:

Replace all incandescent lighting with LED bulbs | Roto Fab CAI | Spyder Black Projector Headlights w/ LED DRL Bar | Holden iQ radio conversion | HSV Steering Wheel | Pypes LT Tri Y Headers
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