We are proud to offer this hand crafted Markski 991 Turbo race Porsche exhaust. This version is the loudest and most aggressive sound we produce. We spent countless of hours developing a unique sound by testing various muffler cores along with muffler packing materials. We make the muffler from scratch in house along with our X design cross over. We offer this system with GESI Ultra High flow EPA legal catalytic converters. The exhaust is TIG welded and ported inside for maximum flow. During the final stage of production we hand polish to mirror finish. 3″ or 2.5″ OD tubing is available. Speak to Markski to discuss your options as we Proudly hand craft each unit in the US per order.