MSD designed this 84673 Race Rotor for their Pro-Billet Distributors # 8351, 8353, 84891. Manufactured from injection molded high-quality and voltage insulating Rynite, it also comes with a stainless steel/low-resistance brass terminal that resists carbon tracking. This rotor is designed with performance in mind and comes standard on most MSD Pro-Billet Distributors. Rotor tip screwed on for high RPM useage. MSD 84673 Distributor Race Rotor Features: Fits MSD Pro-Billet Distributors # 8351, 8353 and 84891 Application: Racing Rotor Color: Red Rotor Material: Rynite Contact Terminal Material: Brass Quantity: Sold individually From street cruisers to Top Fuel dragsters, MSD's ignition systems have been the industry leader for over 40 years. MSD continues to push the envelope with cutting-edge ignition technology as well as intake manifolds and EFI systems.