Mallory 335 Rotor/Shutter Wheel (8Cyl, Unil) Developed specifically for 37 and 38 Series distributors Perfect fit for female distributor caps Delivers unrestricted energy flow Features corrosion resistant brass inserts and stainless steel rotor springs Made of an innovative, space age plastic with high dielectric strength that's ideal for today's high energy ignitions Magneto rotor Comes in red color