Catalytic Converter back order

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Nov 12, 2009 | 10:02 PM

#31

goracer

Junior User

Joined: Jan 2008

Posts: 79

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From: OC-CA.

Quote:

Originally Posted by goracer

For improvement you want the high flow metallic converters. You should be able to pass smog with only the two main cats and eliminating the pre cats. I have an 04 and haven't had to do a smog yet but on my mazda i replaced the precat with a down pipe and it wasnt noticed in visual. It's legal to replace the cats if they are broken or after 80k miles. No car or truckneeds back pressure. People are wrong when they post this. Reducing back pressure does not take away power or torque, it moves it up higher on the curve.

I'm wrong on this, D'oh. The front are the main converters which is backwards to evry other car i've seen with more then one converter. Only '04 had four converters and can't find an answer as to why since the '05 has the same engine.

I thought 4 cat's may have been a CA thing but someone else posted it was the year. Does anyone with a 49 state '04 have only two converters?