| The performance gains reported back to us from active racers have confirmed what we know about this upgrade: It works! With a minimum of modification to your existing chassis, you can install this race brake system on your 911 or 914 and see these benefits: • Upgrade in performance
• Lighter weight
• Use of factory components whenever possible
• No change in existing wheel offsets or body modifications
• Affordable price The Boxster Brake Kit includes adapter blocks, lines with fittings, nuts, and copper sealing washers. Uses standard Boxster calipers, which are not included. These kits are setup to run with the 911 Carrera front rotor and 911SC rear rotor. For 1977 and later cars with boosted brakes, we recommend an upgrade to the 23mm master cylinder found on the 1989 930 Turbo. For 1969-76 cars with non-boosted brakes, we recommend an upgrade to Mercedes Benz master cylinder 002-430-9301-M4 | 
