Part Number: 40-0454 Application: 1999-2017 FXST1999-2017 FLST1999-2017 FXD1999-2021 FLT1999-2021 XL Details:Kit features chrome breather cups that have built in mount bolt for Big Twin models. Bolts are 3/8 x 16 threads UOM: SET Country of Origin: TAIWAN