just installed the tune with the xcal 3 from fswerks. had the aggressive shift points added. i can tell a difference but its not totally devastating... i guess i was just over amping it up and got too excited... car is definitely a little faster but i don't know... does it take time for the tune to truly affect? also im running wheels that are 22lbs each(getting new ones asap) would this be killing my performance? also have fswerks cai and a custom exhaust. looking to put on the f2 header next week will that make a drastic improvement also?