This system was duplicated using original blueprints with details provided by the family of the Arvinode designer as well as Arvin empolyees who worked on the original. This system is not just cosmetic as it incorporates the correct internal design. The forward chambers and resonators are faithfully duplicated as well to provide an accurate sound. The system comes in pieces ready to be welded as original or clamped for ease of installation. Bolts up to a correct H-pipe (not included). Systems come two ways. First is the original style, which has the external damping bars cost $499.00 with a versipon without the bars costs $379.00. Contact NPD at (800) 976-1117 www.npdlink.com