Alston GM Bolt On Subframe Connectors are carefully formed to fit the contour of your stock floor. These Bolt On Subframe Connectors require no cutting or welding to install, allowing you to retain stock exhaust, fuel and brake lines. Alston GM Bolt On Subframe Connectors are jig welded from 1-5/8" x .134 wall round tube with 1/8" steel mounting plates. In less then 4 hours you can preserve the consistency and performance of your Uni-Body chassis. Alston GM Bolt On Subframe Connectors come complete with grade 8 hardware and instructions. Each subframe connector is powder coated black to insure good looks and a long lasting finish.