We tow a 2008 Jayco Jayflight 26bh. Last season, I towed it with a 2002 F-150 with the 5.4 (2v), and 3.31. Prior to towing, I added a K&N cold air intake, Flowmaster cat-back exhaust, and another company's programmer~sorry, I didn't know any better:sadface: The truck pulled the trailer ok, but I wasn't happy.
I've since upgraded to a 2010 F-150 with the 5.4(3v) 3.55ls and tow package. I am looking forward to adding a Gryphon to my new truck
once they are ready.