Just thought I would throw this out there in case anyone tries this. I ordered a shut off and ignition shut off for the red nova(74) from jegs. It came and I saw that it said "for 35 alt systems only . I have a 100 amp on the car. I called Jegs and they said they never heard of that so I read it to them again. Then I call Painless and they said I needed the other one which will go to 250 amps. Painless couldn't explain why they even made a 35 amp kit. The end result with the smaller one on it was a slow shut down and maybe a backfire once in 3 times which I didn't like at all. The tech from painless said it would have smoked the small one at a high rate of speed. SOOO if you buy one get the $70 kit not the $40 one.