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I am running the Bassani pipe with Kooks Green Cats. It definitely flows better for those of us with forced induction but I would say on a naturally aspirated truck it wouldn't be worth the cost. I will note that we had to do quite a bit of tweaking to get it to fit properly, thankfully I have...

I guarantee you it is the evap purge valve. I had this same problem. The purge valve sticks open and the engine vacuum isn't controlled as expected by the ECM so it stumbles on startup. There is any easy way to test the purge valve. It is located on the drivers side of the engine on the...

2013 Raptor - Whipple Supercharged, SD Offroad Trans Cooler, Custom Y-pipe, Tuned by PSI Performance.