MSD GM HEI Street Fire Advance Kit BR10002 The acceleration programs can be

The acceleration programs can be changed using the two arrow buttons on the top of the device

1969-1984 Chevrolet El Camino

2018-2020 Ford Expedition Max XL

this muffler will deliver improved performance

These will locate the spring with an outside step so the spring cannot "walk" around on the head

MSD GM HEI Street Fire Advance Kit BR10002 The acceleration programs can beThis kit will help you achieve the solid ignition timing you need! The Kit comes with new advance weights, springs to set the rate of advance and new bushings. This is designed for the Street Fire HEI and stock style HEI Distributors ONLY. This kit will help you achieve the solid ignition timing you need! This is designed for the Street Fire HEI and stock style HEI Distributors. (Not for use with Billet and Pro Billet MSD Distributors)Features: Fits