Considering a cat delete 1985 stock
Thread Starter
Drifting
Joined: Mar 2017
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From: Nashville TN
2017 C4 of Year Finalist
Considering a cat delete 1985 stock
I've got a very nearly stock 1985 manual and I'm considering a cat delete. I live where this won't be an issue but I'm wondering if this will cause me issues elsewhere in the car, with sensors or something. Never done a cat delete before so just want to understand what I'll gain (hopefully a better breathing engine) and what I need to be careful of.
Zen Vet Master Level VII
Joined: Mar 2016
Posts: 5,218
Likes: 1,174
From: Southlake, TX
You will have zero issues. If you really want to help your car remove the pre cats (I think 85's had them- my old 89 did) and remove the OEM cat. They are old technology that is super restrictive. If you want to keep your emissions, put a new, hi-flow cat on your mid section and you will be good. With that, you can keep all your smog stuff in place. But, if you have the pre cats, remove those first- there is no down side.
Thread Starter
Drifting
Joined: Mar 2017
Posts: 1,897
Likes: 165
From: Nashville TN
2017 C4 of Year Finalist
The cat on there is not original. No idea if it's high flow but the PO must have had it replaced. I was under there doing u joints and found myself wondering if I even need the thing. Would love to just straight pipe the whole thing.
Edit: the Mufflers are dynomax. I doubt those are stock either.
Edit: the Mufflers are dynomax. I doubt those are stock either.
Last edited by Bfenty; Feb 24, 2019 at 08:42 AM.
Zen Vet Master Level VII
Joined: Mar 2016
Posts: 5,218
Likes: 1,174
From: Southlake, TX
Plug it or remove it. From what I remember, this is part of the emissions system pumping O2 into the cat to help it "warm" faster. Really don't need it.
Last edited by billschroeder5842; Feb 24, 2019 at 09:42 AM.
Thread Starter
Drifting
Joined: Mar 2017
Posts: 1,897
Likes: 165
From: Nashville TN
2017 C4 of Year Finalist
