Reproduction of the original power brake booster to firewall seal designed for use on 1969-73 Mustangs with Bendix style brake boosters. This seal installs between the brake booster and the firewall preventing moisture from entering the interior of the vehicle. The stock seals become brittle after time and usually need replacing. Fits crimped style Bendix boosters only. Note: Will not fit clamp-style Midland boosters. Ford Applications:1969-1973 Ford Mustang.