MC1921H - GM Universal Style Cast Iron Master Cylinder

GM Universal Cast Iron 1" Bore; 9/16" & 1/2" Ports on Left Sides; Exact Copy of Original Master Cylinder has a piston adaptor that will allow for power or manual applications.

• For Disc/Drum or Drum/Drum Applications. (Note: if you are running Drum/Drum you will also need a metering valve PVM)