S&S Valve Spring Kit. Standard to .550" Lift for Harley-Davidson

Kit includes aluminum upper collars and valve springs.
High performance spring set that can be used in all applications from stock cams to 0.550" lift cams.
Note: Lower collars and valve keys/valve guards must be reused.
Note: Panhead may require clearance between rocker cover and top collar.
Note: L81-84 Shovelhead must use standard style lower collars (18222-81) or purchase them separately as MCS 982281.

Fits: > 48-66 Panhead; 66-84 Shovelhead (NU). See notes