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SportTrac Discussion
Engine & Drivetrain
Removing CATS for MPG
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<blockquote data-quote="TrainTrac" data-source="post: 893623" data-attributes="member: 55399"><p>It's been quite a while since I removed mine and installed the R/T y-pipe, so my recollection isn't clear on exactly how many cats are on the y-pipe. Could be two or four. I guess it doesn't really matter in this discussion. </p><p></p><p></p><p></p><p></p><p></p><p></p><p></p><p>At the aft end of the y-pipe where it comes together into the single exhaust, there are indeed <strong>two</strong> catalytic converters in the exhaust pipe. And the O2 sensor is just aft of these converters. If you look at the picture of the R/T high-flow cat on the Zabteck website, you can see the bung for the O2 sensor just aft of the cat, and this is the exact same position as on the OEM cat pipe. So eliminating these cats with a test pipe <strong>will</strong> require a tune to prevent throwing a CEL code. </p><p></p><p></p><p></p><p></p><p></p><p></p><p></p><p>Vendors who write tunes for XCal3, Diablo Predator, etc. (like Torrie) do it all the time for folks who go with a straight exhaust. As far as I know, that's the only way to do it and not get a CEL code.</p></blockquote><p></p>
[QUOTE="TrainTrac, post: 893623, member: 55399"] It's been quite a while since I removed mine and installed the R/T y-pipe, so my recollection isn't clear on exactly how many cats are on the y-pipe. Could be two or four. I guess it doesn't really matter in this discussion. At the aft end of the y-pipe where it comes together into the single exhaust, there are indeed [b]two[/b] catalytic converters in the exhaust pipe. And the O2 sensor is just aft of these converters. If you look at the picture of the R/T high-flow cat on the Zabteck website, you can see the bung for the O2 sensor just aft of the cat, and this is the exact same position as on the OEM cat pipe. So eliminating these cats with a test pipe [b]will[/b] require a tune to prevent throwing a CEL code. Vendors who write tunes for XCal3, Diablo Predator, etc. (like Torrie) do it all the time for folks who go with a straight exhaust. As far as I know, that's the only way to do it and not get a CEL code. [/QUOTE]
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SportTrac Discussion
Engine & Drivetrain
Removing CATS for MPG
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