Part Number: 13-9251 UOM: 4 - SET Summary:Andrews high lift valve springs .550+, no machining required . Includes 4 inner and 4 outer springs. Fitment: FXST 1984-1998 FLST 1986-1998 FXD 1991-1998 FLT 1986-1998 FXR 1984-1994 XL 1986-UP Country of Origin: USA