Abstract: An improved piston to seal configuration for a master cylinder including a master cylinder housing defining a bore, the bore defining an elongated axis, a seal groove defined by the master cylinder housing and disposed about the bore, a seal positioned within the seal groove and a piston closely and slideably received within the bore, wherein the piston includes a distal end and a chamfer formed on the distal end, the chamfer being adapted to engage the seal, with the caveat that the piston is free of bypass holes.