Quote:
Originally Posted by 2017370ZBlack
Once you install the HFC's, I guarantee you will get the check engine light coming on all the time. Then you will need a tune unless that doesn't bother you.
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I guess I don't know for sure as I bought it this way, however, my car has intake, exhaust, and HFC and I don't believe it has a tune and I don't get any CELs.