Autoworks Parts Taking a closer look at our 7" dual diaphragm brake booster with a Wilwood master cylinder machined to fit. We love the performance of this product and you won't be able to find it anywhere else. The smaller diameter booster allows for the use of hydraulic clutch master cylinders that mount to the firewall. Options for most 1964-1970 Mustang applications. Autoworks Parts 10042 Prospect Ave Santee, CA 92071 (619) 401-6900 http://www.autoworksparts.com