MSD Extra Duty Distributor Cap # MSD8433Distributor Cap, Male/HEI-Style, Red, Extra-Duty, Pro-Billet, Screw-Down, GM, V8, Each Cap Style:Male/HEI Cap Attachment Style:Clamp down Contact Terminal Material:Brass Plug Wire Retainer:Yes Cap Mounted Coil:No Distributor Cap Material:Rynite Coil Dust Cover Included:No Distributor Cap Color:Red Quantity:Sold individually. Notes:This cap includes 10-32 x 1.25 in. hex screws that allow it to be used as a bolt down cap on MSD Pro-Billet and Billet distributors. Ensure that you have the finest distributor cap available by using one of these MSD Extra Duty distributor caps. They're designed with performance in mind, are molded from a high-quality, voltage-insulating material, and use low-resistance terminals for maximum conductivity .