I have an 04 cobra. Cai, borla catback otherwise stock. Will a diablosprt tuner help tune a bit and get me more power? Also, would the tuner help once i get a 2.76/2.9 pulley? Can i use the diablosport for mail order tunes and do you all recommend a mail order tune? I live in el paso tx and there are no tuners i trust in town. A friwnd is selling me the diablosport tuner For $125. Should i buy it? Thanks