 It doesn't look different but this spg9.com modified apc box is the key to getting more power. I probably shouldn't have.. but I peeked inside as soon as I got it. They did extensive circuit work on these things. There are resistors bridged across things and capacitors removed. They went thru the circuit and improved the functions of the apc. Needless to say, my tweaking of the stock apc days are over! I hit 18 psi and 20+ with octane booster! But 18 is good enough for everyday driving. dave |