Well according to corey i should be getting my custom tunes today
anyway i should have asked this earlier but is there anything i should do before i add the tunes to the gryphon?
the only think i can think of is that i got bigger wheels and tires
well actually went from the stock 20's to 18's but i went to a BFG 285/75/18 tire i believe it is
i know about the tire size calculator in pegasus but i dont know what to do with it?
any help?
other than that anything else?