MSD LS Ignition Control - Black 820995 an installation kit must be

an installation kit must be purchased separately

1979-1987 GMC G1500

***If replacing the old style socket clip on cap

1998-2019 Chevrolet Express 3500

18 x 18 in Window Nets

MSD LS Ignition Control - Black 820995 an installation kit must beAs the popularity of GM LS engines continue to grow, so does the demand for a powerful, reliable and easily adaptable ignition system. MSD has answered this demand with an updated and improved version of the popular 6LS box. Whether using a stock crate engine or building a custom powerhouse, the MSD LS Ignition provides the control you need to achieve the performance you want. Dial in the perfect tune for your LS using the easily adjustable preset