Zilverado Posted May 12, 2007 Share Posted May 12, 2007 So I'm wondering what to do replacing my cat (it's rattling inside). Do I spend the big money ($300 to $400) and go with an OEM (with flanges) or do I spend under $100 for one I just clamp in. I was also debating just going with a straight pipe, but that would likely cause my O2 sensor to freak out and give me a "Check Engine" light? What have the rest of you done? Thanks in advance. Link to comment Share on other sites More sharing options...
wheel366 Posted May 12, 2007 Share Posted May 12, 2007 I replaced mine with a high flow cat but it was around $350. I forget who makes it. It came from a company in CA. I had two cats. I replaced the precat with a straight pipe. Link to comment Share on other sites More sharing options...
PATHRIDER Posted May 13, 2007 Share Posted May 13, 2007 A lot here uses this http://store.summitracing.com/partdetail.a...mp;autoview=sku Link to comment Share on other sites More sharing options...
LD50 Posted May 13, 2007 Share Posted May 13, 2007 I don't have a cat. Funny you should mention the o2 sensor though. I did the exhaust a year ago and there were no issues. my o2 sensor just went on me a couple weeks ago, i don't think its related though - probably an old sensor. Link to comment Share on other sites More sharing options...
XEcaribe Posted May 13, 2007 Share Posted May 13, 2007 i know they make an O2 simulator for my car, but i have never heard of it for suvs although i havened owned an suv for very long. Link to comment Share on other sites More sharing options...
LD50 Posted May 13, 2007 Share Posted May 13, 2007 (edited) i know they make an O2 simulator for my car, but i have never heard of it for suvs although i havened owned an suv for very long. The o2 sensor on a WD21 is located before the cat, so once (if) the cat is removed, the o2 sensor remains in place and operates normally. Edited May 13, 2007 by LD50 Link to comment Share on other sites More sharing options...
Slick Posted May 14, 2007 Share Posted May 14, 2007 i paid $50 for my HF cat.. and have had no issues. as for 02's.. couldn't tell ya.. mine is happily in place down there. Link to comment Share on other sites More sharing options...
Zilverado Posted May 14, 2007 Author Share Posted May 14, 2007 The o2 sensor on a WD21 is located before the cat, so once (if) the cat is removed, the o2 sensor remains in place and operates normally. That's a good point, I forgot about that. I'll make some calls tomorrow and see what I can find. Thanks for all the advice. Link to comment Share on other sites More sharing options...
mws Posted May 14, 2007 Share Posted May 14, 2007 I used the $50 Dynomax ultra converter and welded it to the stock flange. Link to comment Share on other sites More sharing options...
slimer Posted May 15, 2007 Share Posted May 15, 2007 I found an old O2 sensor in my garage the other day if someone wants it. I won't be needing it. Link to comment Share on other sites More sharing options...
Slick Posted May 15, 2007 Share Posted May 15, 2007 I found an old O2 sensor in my garage the other day if someone wants it. I won't be needing it. does/did it work? if so, i'll take it! Link to comment Share on other sites More sharing options...
slimer Posted May 15, 2007 Share Posted May 15, 2007 (edited) I never tried it, its never been wired. PM me your addy and its yours. I have to go to UPS tomorrow anyway. IIRC I think the directions for wiring is there too. Edited May 15, 2007 by slimer Link to comment Share on other sites More sharing options...
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