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The final step in my quest for better brakes was to swap out the 1-inch bore master cylinder for the slightly smaller bore cylinder from Classic Performance Products, reasoning that the smaller bore might give more pressure at the expense of a little further pedal travel. CPP's cylinder is supplied with four bungs to seal the outlet ports during bench bleeding, as well as a rubber boot and bore adapter. Manual brake applications require the pushrod extend a couple inches into the master cylinder, in order to prevent it from accidentally falling out. The adapter is therefore needed in power brake 'shallow bore' applications.