Hello, I've got a '99 model so just the single big cat, looks like it is still the stock one. I've read different things some saying that a high flow cat will trip the check engine light, just wondering what people have used?
Are you doing anything to the exhaust system as well. wjjeeps only quote a 2hp improvement from a high flow cat . There a whole section in the wjjeeps site about exhaust improvement and no mention of MIL illumination.
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I got a sweater for Chrissy, nothing wrong with that except I was hoping for a moaner or a screamer.
It's got a 2.5" pipe from the cat into a hooker aero chamber muffler. Main reason for the high flow was thought it would be a little louder again, not too worried about hp gains as it is minimal
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1999 Jeep WJ GC
'99 WJ High Flow Cat
. There a whole section in the wjjeeps site about exhaust improvement and no mention of MIL illumination.
