EARLY MODEL TIN PRIMARY HOUSING | Big Twin

Inner Covers, Fits Big Twin 1937-1954, chrome, Genuine Zodiac (OEM 3803-36, 60620-36)

Stamped steel inner and outer primary covers are also known as "tin" primary. Available for all 4 Speed Big Twin. Can be used as stock replacement for Big Twin with stock steel primary or as Custom replacement for later models without electric start.