I have a 03 cobra with a kb 2.2 car made 542 rwhp on mustang dyno very safe tune. Timing is conservative 19 deg total. A/f is 11.2 wot, 60lb inj with kb bap at 40% fuel system is at 66%. I found a zex wet kit with a ton of extras for $250 and its only had 4 bottles thru it. It has all the instructions fittings lines and original box. I want to run the 55 shot , please tell me ur thoughts on if a retune is nesassary or if it will be fine.