Re: Removing Exhaust Cat
I did it on my old ride, and it will be getting done to mine pretty soon. It works fine without the cat. The car will run the same, just there's a chance of the CEL coming on. The second 02 sensor is just there for monitoring cat efficiency, it doesn't change the air fuel ratio any.
I would recommend carefully cutting the cat out so as not to damage it. They are VERY expensive, and if testing does become mandatory, then you can just weld it in. I think I had looked it up and it was around $600, not cool if you have to replace!
Some guys like gutting their cats so it looks like it is there. That actually looses hp because of what it does to the exhaust. Exhaust travels slower through a larger area. Blow in a straw, then blow through a garden hose, the air goes faster through the straw. With a gutted cat, the exhaust gets slowed by the large cavity of the gutted cat, then kind of lingers, the engine then ends up pushing the exhaust out with the next exhaust stroke which costs you power. With a pipe welded in place the exhaust maintains velocity throughout the system and you remove restriction. Didn't think it sounded like you were wanting to gut your cat, but I find it very interesting how exhausts work and thot I'd share!
Ben
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2001 Red PT Cruiser Limited, 16" OEM alloys, Airaid CAI, Screamin' Demon coil and Livewires, some shiny stuff inside, Alpine deck, Alpine four channel amp, Alpine PLT5 sub, Hertz speakers in 4 corners, Keystone ram air hood, 6000k 55w HID high beams, 6000k 35w HID fog lights, new stone chips every day to add character.
2007 Suzuki King Quad 700 4x4 for when the road gets bumpy.
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