Hey guys. I have the superchips 1725 for my car. It came with it when i bought it the cobra. Tonight was the first night that i hooked it up and the guy who had it before me had the HP4 Program installed. Superchips says this about it "Includes HP4 program for 4lb pulley on 2003 Models" In the manual it was talking about 87 octane fuel with that program too. I changed it to the Performance setting. I am just curious if anyone can describe to me in better detail the HP4 setting compared to the Performance setting. Thanks guys...
