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06-21-2013, 10:41 PM
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#20 |
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Registered User
Join Date: Apr 2013
Location: Pasadena, Maryland
Posts: 160
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Re: originally equipped with catalytic convertor?
Owned two 1986 K20 trucks, one had cats, one didn't. Engine code M was HD emissions with no cats. Engine code L was light duty with a cat. Looked in my 87 GM service manual, there is two 454 engine codes, W and N, carbed vs TBI. But like Keith stated all gas engines of this year were equipped with cats..
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