Rear cats

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Nov 4, 2010 | 06:49 PM

Napoleonpig95

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Napoleonpig95

Joined: Aug 2010

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From: Minnesota

Rear cats

I have a 1997 f150 and i was wondering if the two rear cats are just resonators? Or do they actually cut down emissions?

Nov 4, 2010 | 07:59 PM

rtg143

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Joined: Apr 2010

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From: Newport, Oregon

Anything in front of the O2 sensors cut down on emissions. Any cats after them do too.

Nov 4, 2010 | 08:31 PM

Napoleonpig95

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Napoleonpig95

Joined: Aug 2010

Posts: 44

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From: Minnesota

If i remove my rear cats do you think my CEL will come on?

Nov 4, 2010 | 09:16 PM

jayson_waltz

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Joined: Feb 2010

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From: Grand Forks, ND for college; Langdon, ND is home

there is a couple other open threads about this right now. the rear cats are mainly resonators and do little for emissions, the CEL will not even come on if you remove them.

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