Zl1 cat removal
Any one know if getting the cats removed and switched to straight pipes will trigger cel? I just got my zl1 and I have all the mods waiting to be put on etc but I don't wanna mod a brand-new car out the box I'll give a a few months . So would just cutting out the cats cause any problems or need a tune ?
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Removing the cats will throw a PO420 and PO430 code.
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Removing secondary cats won't throw a CEL.
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Yes that will throw a CEL and you will need a tune.
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In different terms. The O2 sensors sit in-between the primary and secondary cats. If you pull the cats forward of the sensors you'll throw a CEL. If you pull the ones aft of the O2 sensor you're fine. |
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Awesome thanks guys
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Also, not sure why you would want to delete cats on a stock car. |
I'm hoping to eliminate at least a hundred pounds and pick up 10RWHP once dropping the secondary cats:bonk:
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If you are not going with a full exhaust replacement ie headers on back, I wouldn't mess with taking the cats off. You will also be voiding the warranty. Add a Tony Mamo TB, Green air filter and a Borla, Corsa or who ever cat back and you will have your 10 HP plus a few more.
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Results - Better throttle response, throatier exhaust, and a little more power as measured by my calibrated butt dyno. I did all of that with an agreement with the Dealer. Only questionable warranty mod so far has been the Elite E2-X Catch Can. |
I gutted the secondary cats on my gen6 SS and never had an issue. It didnt save much weight but made it sound better. I havent done it on my ZL1, its loud enough!
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