Catalytic Converters

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Apr 20, 2014 | 11:23 AM

njjr

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Joined: Apr 2014

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From: Rosedale, Md

Catalytic Converters

I am going to replace the exhaust system on my 1989 F150 with the 4.9 6 cylinder engine. I am considering not installing a catalytic converter.

How will this affect this engine? Will I need to make any other changes so the engine runs smoothly?

Apr 20, 2014 | 11:36 AM

Conanski

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Joined: Jun 2006

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From: Ottawa, Ontario

It won't affect the engine at all but considering the cost of a universal cat($60-80) and the fact it will clean up tailpipe emissions there is no good reason not to install one.

Apr 20, 2014 | 01:33 PM

Jarryd

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Joined: Mar 2013

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A lot of people claim the 4.9 sounds bad without them. I haven't heard one without in person so I can't give my opinion on that.

Apr 20, 2014 | 09:32 PM

460jared96

Tuned

Joined: Oct 2013

Posts: 348

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From: British colombia

It shouldn't have much of an effect. Maybe a rich less torque but a bit more power in the long run. The biggest change will be in sound. If your concerned about sound and tail pipe emissions, a high flow cat is your best bet.

Apr 21, 2014 | 12:09 PM

RIKIL

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Joined: Sep 2008

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It will also stink. Use a high-flow cat (49 state legal), they aren't that restrictive. You can hold them up to the light and see through. Not like the 50 state legal cats.