Mallory 338 Shutter Wheel Perfect fit for virtually all V8 engines with 37 Series and 38 Series Mallory Unilite distributors Delivers an almost unrestricted energy flow Made of an innovative, space age plastic High dielectric strength is ideal for today's high energy ignitions Compatible with both right hand and left hand rotation Designed to provide high impact-resistant qualities to prevent damage Made from space-age plastic Facilitates high dielectric strength Features unrestricted energy flow Easy to install