Cal Custom Cast Iron Brake Master Cylinder 1⅛" Bore O.E. Style, GM, CHEV, Holden

• Chrome Aluminium O.E. GM Style Master Cylinder
• 1⅛” bore
• Centre to centre measurement of the mounting bolt holes is 3-3/8”
• 9/16” and ½” ports on both sides
• Four port unit meaning you can mount your lines to either side
• Works for:
  • disc/disc
  • disc/drum
  • drum/drum
• Shallow pocket
• Fits most aftermarket boosters including Cal Custom and MBM, as well as all original GM (same 2 and 4 bolt pattern)
• Considerably lighter than O.E. cast iron master cylinder
• Can be mounted to original firewall location when not using a booster

NOTE:

• When mounting any master cylinder under the floor, residual pressure valves are necessary to prevent loss of brake pressure (they are not usually required for firewall mount kits).