Part Description
Fits 1936-1947 Knucklehead Big Twin & 1948-1965 Panhead Big Twin (OEM 18203-36 & 18204-36, 18201-57), Valve spring set
Text excerpt from the catalog:
Springs are made of top quality spring steel, exceeds OEM specifications. Sets for Sidevalve models consist of 4 springs, sets for other models consist of 4 inner and 4 outer springs.