WILWOOD 120-7740-BK, GP310 BRAKE CALIPER, 1984 - 2012 HARLEY DAVIDSON MOTORCYCLE, REAR, RIGHT, BLACK Brand New Wilwood GP310 Motorcycle Brake Caliper With Pads (Part # 120-7740-BK) Fits The Rear Of 1984 To Present Harley Davidson's That Have 11 1/2" Diameter Rotors &gt; Right Hand Mount &gt; Features A Black Body &gt; Fits .250" Thick Rotors &gt; Features Four 1.25" Pistons Wilwood's GP310 Rear Motorcycle Disc Brake Caliper Has Been Designed And Engineered For Use On 1984 - Present Harley-davidson Motorcycles &gt; Built Around A 4-Piston, High Performance Powerhouse, This Billet Aluminum Caliper &gt; Brings Distinctive, Bolt-On Styling: Bracket-Mounted Calipers With A Standard 3.50" Mount Spacing Are Available For All Most Models (Except Springer And 4-Speed Fl Models) Features The Added Performance Characteristics Found In Wilwood's Racing Calipers: &gt; Stainless Steel Pistons To Reduce Brake Fade While Resisting Corrosion And High &gt; Temperature Piston Seals For Extended Life, Controlled Retraction And Drag Free Operation Additional Features Include Bright-finish Bleed Screws, Exclusive Pad Anti-rattle Clip, And Brake Pads Designed To Operate In The Widest Range Of Temperatures And Environments, Utilizing Our Industry Leading Stainless Steel Rotor Compatible Formulation