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Discussion Starter #1
Is there any point of getting a tune if you have the catalytic converter on the header?

I have a 2.3L Duratec with a Cosworth intake, CFM Throttle body and FocusSport Cat back exhaust.

Also if yes, would I have to return the computer to stock before going to get a smog?

I live in California.

Thanks!
 

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w/ my magic bag
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Yea, I'd do a tune w/ a converter. Do they check to see if you have a converter? Or just read the obd2 for codes?
 

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w/ my magic bag
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I'd throw a pr of cams in too.
 

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Discussion Starter #4
Depends on where you go but they are supposed to plug into the OBD II port, do a visual check and then run it on the machine.
 
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