MSD DIS Ignition Tachometer Driver - For Use With Aftermarket Tachometer On Distributorless and Multiple Coil Pack Vehicles Brake Prop Valve High performance cam for everyday

High performance cam for everyday driving

1957-1968 Pontiac Bonneville

GM HEI Distributor Coil

or low vacuum conditions

MSD DIS Ignition Tachometer Driver - For Use With Aftermarket Tachometer On Distributorless and Multiple Coil Pack Vehicles Brake Prop Valve High performance cam for everydayEver wonder how you can install an aftermarket tachometer on a vehicle with no distributor and multiple coil packs? MSD has the answer with the Distributorless Tach Driver! The compact Tach Driver measures only 1. 5 x 3. 5 x 2 and is potted with a polyurethane compound for vibration and water protection so it can easily be mounted under the hood. It wires inline on the coils 12 volt supply wire where it senses the current going through this wire and