MSD designed this 8410 Rotor for their Pro-Billet HEI Distributors. 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 HEI Distributors. Rotor tip screwed on for high RPM useage. MSD 8410 Distributor Rotor Features: Fits MSD Pro-Billet HEI Distributors 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.