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With the Hydratech Hydroboost unit assembled and plumbed, we mounted the master cylinder, finished the last two brake lines, and were ready for a testdrive. For master-cylinder choices, we went to the experts at Master Power Brakes and spec'd one of its street-rod master-cylinder kits (PN MC1005PZ; $199.95). This is a 1-1/8-inch-bore master cylinder for power four-wheel disc brakes and features a remote reservoir system-something we felt was required on the Roadster due to the semihidden location of the master-cylinder mounting. The MC1005PZ features both left and right fluid ports, which allows you to plumb your brake lines to either side of the unit.