The CP7854 from AP racing is a range of short push type master cylinders which mount direct to the balance bar via a trunnion system. The trunnion runs in needle roller bearing for the smoothest operation. A one piece piston / pushrod design significantly improves the cylinders efficiency compared to traditional types.Trunnion mount with roller bearings for smoother operationExtra short travel to cut off 0.48mm-0.63mm (.019"-0.25")One piece piston / pushrod for improved efficiencyHard anodised aluminium body for corrosion resistanceDimensions: Full stroke (14mm to 7/8" bore) - 30mm (1.18"), Full stroke (15/16" to 1" bore) - 28mm (1.10"), Travel to cut off - 0.48-0.63mm (.019-.025"), Inlet thread - 7/16" UNF, Outlet thread - 3/8" UNF, Pushrod thread - 5/16" UNFSuitable for use with AP racing CP5509-1 floor mount pedal box and CP5520-3, CP5520-4, CP5520-25LC balance bars.