$425 is amazingly cheap!!! If I could find it for that price I would probably just do it. But I am in OREGON The cat dump fuel strategy is probably why my fuel map on the safc goes from 6000rpm +8% 6500rpm +5% to 7000rpm +/-0% otherwise the O2 readings just go way rich. This may sound ignorant but does your setup just plug directly into the ecu or do you program a chip that the plugs into the ecu. BTW are you with the company that turboed that 1st gen legend a year or two ago?

ATX MTX swap, rear drum disc swap, drilled rotors, ported intake, optim throttle body, CAI, 7.5L MAF, adj. fuel regulator, longtube headers, underdrive pulley, no EGR, low inpedence bigger injectors, 2002 Focus Swap