i just got the car back from C&M and since i had a chip burned, i have no use for this anymore. its a Ford Motorsports SVO RPM Extender box. it worked when pulled (yesterday) it was in my 89 LX so im assuming it will go in any Fuel injected Fox body. it comes with the harness so this is a PLUG AND PLAY deal. no splicing wires, no hacking of any sort. from what i gather it controls your A/F ratio at certain RPM ranges. i honestly dont know what this is worth, but it seems like a nice little set-up. so ill say $80 for the box+ harness.