Need the highest possible spark energy and spark gap current? These FAST I91 inductive coils are just the ticket. They are the recommended coils for street use with FAST HI-6, Mallory Hyfire, and MSD 6 CD systems. They also work great with FST DMSI, HI-6S, and XR3000 inductive ignitions. They are not designed for race or extended high-rpm use with high-output ignitions, or for use with points.

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