Our uniquely designed Detroit Speed weld in subframe connectors increase your car's stiffness by connecting the front subframe to the rear frame rails. Our subframe connectors are fabricated from 1.5" x 2.5" x 0.083" wall rectangular steel tubing. The subframe connectors include front frame rail saddles and end caps for added strength and stiffness. Unlike others, the Detroit Speed subframe connectors are barely visible from underneath the car giving you the maximum amount of ground clearance that you can't get with competitor's bolt-on kits. The rear of the connector attaches to the Detroit Speed torque boxes that come with the Mustang® QUADRALink kit or the Mustang® Mini-Tub Kit. The connectors are bent and TIG welded in a fixture for accuracy and repeatability. Our subframe connectors do not interfere with seat attachment hardware or the installation and removal of the rear leaf spring pocket. The subframe connectors can be installed on convertibles. Additionally, the molded factory carpet will still fit over the subframe connectors. Our weld-in connectors are supplied with templates and detailed instructions for installation.