Tune without HFC

Originally Posted by ColtronZ

Don't sell your cats and put them back on if you don't like the HFC. IMO you have Motordyne, I wouldn't pair gold standard with bronze standard, get ART pipes. I really don't see how anyone wont like that combo but to each their own.

You'd be increasing the airflow and removing the bottleneck. You'd probably see and feel decent gains. If you're going to spend $800 on a tune why not go the full distance and get the most value out of your exhaust and intakes you already have and make your tune the most worthwhile for the money? Those are some of the most common and biggest gains you can do.