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 do not use any over the counter pre made components. Stainless steel V bands and .5″ thick custom cnc machined flanges are welded to catalytic converters. We offer this system 200 catalytic converters. Catless systems also available for off road use only. The exhaust is TIG welded and ported inside for maximum flow. During the final stage of production we hand polish to mirror finish. A 3″,2.75″, or 2.5″ OD tubing is available. Dual 3″ tips are available for additional fee. Speak to Markski to discuss your options as we Proudly hand craft each unit in the US per order.