obp Motorsport Remote Master Cylinder Our specially selected range of products that work in unison with all of our obp Motorsport core hardware. Whether you are looking for master cylinders, bias adjusters or replacement parts. obp Motorsport has you covered. Product Information: Inlet Fitting: 7/16″-20 UNF Outlet Fitting: 3/8″-24 UNF Push Rod Thread: 5/16″ Pushrod Length: 84mm Bolt Hole Spacing: 1/4″ Piston Stroke Length: .75 = 31.5mm