This Cat-back system is a simple but effective install for your 1998-2004 Porsche 911/996 Carrera. It uses all the factory hardware and bolts directly in place of the factory mufflers. Built with 2-1/4 inch 304 stainless steel tubing, it will provide years of maintenance free service. The No-Muffler design provides weight reduction with an extra aggressive exhaust tone. The system is finished off with four slash cut tips for aggressive good looks.