I know I'm going to get a lot of negative responses... But, I'm sure you guys can help. I have a 06 gt, automatic, long tubes, no cats, c&l racer cai, 3.73's, carbon fiber gt500 differential, sct tuner, adjustable rear lower arms, adjustable rear upper, the rest is stock. Tires are kumhoes... Cause i drive 100 miles a day... The car sits on h&r sport springs, stock shocks, ford racing sway bars... Im not wanting to spend much on this car, but, i want a 12, 1/4 mile et out of it, as is.... Runs 13.16, 13.18... 105mph... Has spiked 107, 109,111 mph... Any good advice?