Ford Big Block Crank Trigger Kit - 8644 4wd-switches 3 V6 1978 GMC C25

3 V6 1978 GMC C25 Suburban 292/4

We make no claim of usability or suitability for highway or road use

8 V8 1966 - 1971 Ford Custom 500 390/6

The core is lubricated with Teflon prior to assembly and then sealed in a heavy plastic outer casing for a lifetime of durability and smooth operation

5L V8 1970 Chevrolet Nova 402/6

Ford Big Block Crank Trigger Kit - 8644 4wd-switches 3 V6 1978 GMC C25Overview: For a long time, racers have known that one of the best things to do to an engine to improve its performance is to stabilize the ignition timing. The MSD Flying Magnet Crank Trigger system does exactly that by using four magnets embedded in an aluminum wheel. Although similar in appearance to other crank triggers, the MSD Flying Magnet design works on a different principle. Most crank triggers have a wheel, with steel studs sticking out,