This Chrome 4 piston front caliper is manufactured by the best name in the business...

WILWOOD RACING CALIPERS

Fitment  is for 84 - 99 Softails and all Custom applications

Wilwood's motorcycle calipers have been designed and engineered for use on Harley-Davidson ® Motorcycles.
Built around a 4-piston, high performance powerhouse, these billet aluminum calipers bring distinctive, bolt-on styling:

Direct leg-mounted calipers are available for all single and dual disc models (except Springer and 4-speed FL models), as well as the 1983 XR 1000.