Single Bolt Kit for obp Motorsport Master Cylinders, Pedal Systems and Handbrakes 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: 2x 25mm M8 Hex Dome Head Bolts 2x M8 Nyloc Nuts 4x M8 Washers