1" BORE TANDEM MASTER CYLINDER WITHOUT THE PUSH RODLIGHTWEIGHT ALUMINUM CONSTRUCTION1" STAINLESS STEEL SLEEVED BORESLOTTED 2 BOLT MOUNTING FLANGE ACCEPTS 3/8" & 10MM BOLTS, AND ALLOWS FOR MOUNTING TO 3 1/8", 3 1/4", AND 3 3/8" CENTER-TO-CENTER PATTERNSTHIS MAKES IT A SIMPLE BOLT-ON TO MANY OE MOUNTS INCLUDING THE POPULAR CHRYSLER, CORVETTE, GM, & FORD MUSTANG BOLT PATTERNSHEIGHT FROM CENTER LINE TO THE TOP MOST POINT ON THE RETAINING BAR IS 3 1/2"MEASURES 8 3/4" FROM MOUNT SURFACE TO FRONT OF CYLINDER BODY3/8"-24 INVERTED FLARE PORTS ON EACH SIDE TO ACCEPT 3/16" LINEINCLUDES PLUGS FOR THE SIDE THAT IS NOT USEDFEATURES A DEEP PISTON DESIGN & INCLUDES A PISTON ADAPTER THAT ALLOWS IT TO BE USED FOR MANUAL & POWER APPLICATIONS