I have 95 G20t w/at. The car is tuned with KYB GR-2 shocks and struts, 15 inch Borbet rims with 205-55 Kumho Ecsta Supra 712 tires, Piaa head and fog lights, Auto Meter voltmeter and A/F ratio gauges, Levoc Shift Knob, Ngk spark plugs and wires, OBX oil breather, 3 Nismo badges, 2 Nismo stickers, Stillen Oil cap, Stillen CAI, Stillen 4-1 headers, Stillen strut bar, stillen ECU box, stillen MAS, Greddy MX exhaust, Sparco shoulder pads, a fake fuba anntanna, customized bumper guards, Red line water wetter, Red line AT fluid, Z-MAX, Mobile-1 5w-30 oil, and 55 shots of ZEX NOS kit. My problem is the ZEX kit. The instruction of the kit states that in order to use 55 shots, a stock ignittion timing should be used with 92 octane if not detonation would occur. When I asked the stillen guys how much IT is advanced, they answered which might be 2 or 3 degrees. I'm thinking about getting NOS pressure gauge, octane booster, and APEXi ITC controller. Does APEXi ITC controller, which can advance and retard IT, work? Has anybody has a good advice or suggetion?