If I replace my cat and I pipe with a 3" Catco and 3" piping, will I need O2 sims or will my O2 sensors work fine on that cat? Should I opt for a 2.5" cat instead if I swap cats?
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3" Cat requirements?
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Sometimes it will be just fine, and sometimes you get the dreaded SES light. I have heard some people get a high flow cat and never have any problems97 Red Firebird<br />Best N/A 1/4: 13.98<br />Best N/A MPH: 96.13<br />Best Nitrous 1/4: 12.49<br />Best Nitrous MPH: 108.53<p>2001 Pewter Camaro SS <br />GTP Stage II Heads, Pig Cam, Holley Intake, SLP Headers, SLP Lid, Vigalante 3600 Stall Converter, MagnaFlow Cat Back Exhaust, Duel Electric Cut-Outs<br />11.26@121
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<blockquote>quote:</font><hr>Originally posted by Silver2000V6:
I've had my Catco 3" for a couple months now without O2 sims and haven't had any problems.
[ February 14, 2002: Message edited by: Silver2000V6 ]<hr></blockquote>
ditto
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same with me. going on to about 3 months with the hi-flow, and i don't have an ses light. still using the same 02 that came with the car.\'96 <b>Quasar Blue</b> Firebird A4<br /><a href=\"http://jamiethekiller@comcast.net\" target=\"_blank\"><i>jamiethekiller@comcast.net</i></a><br /><a href=\"http://www.woodlandrock.com\" target=\"_blank\">my band: woodland</a>
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