These full front frame rails are the latest addition to their product line up of front and rear frame rails for early model Mustangs and Cougars. The rails are welded boxed frame construction and made of 13-gauge steel. They include welded nuts in the appropriate locations. Mustangs Unlimited has frame rails for 1965-1973 Mustangs and Cougars and they are celebrating 33 years in business. You can contact them at (770) 446-1965 www.mustangsunlimited.com