okay i have an aem adjustible cam gear so thats good to go. so i'm going to have to buy a Fuel Pressure Regulator. got it. i have a crower stage 2 but its not installed because i still have my questions about stage 3 and my set up. i'm possibly going to keep my stock pistons instead of the p29s so i think the stage to is good for me. right now my cars running a 16.3 with a reaction of .004. what should i expect with the crower stage 2 cam. i'm assuming 15.5. BTW, the 16.3 is without headers and a stock motor.