Kit includes aluminum top collars and valve springs. High performance spring kit that can be used in all applications from stock to .550" lift cams. Note: Lower collars and valve keys / valve keepers must be re-used. Note: Panhead may require clearancing between rocker cover and top collar. Note: L81-84 Shovelhead must use stock style lower collars (18222-81) or purchase them separately as Fmc-982-281.
Fits: > 48-66 Panhead; 66-84 Shovelhead (NU). See notes
