Pypes Exhaust Systems are designed to deliver enhanced performance, provide extra punch in the passing lane and improve gas mileage. Fabricated using the highest quality materials, 16 gauge, mandrel-bent, stainless steel pipe ensures maximum exhaust gas flow, which can significantly boost horsepower. The stainless construction of our pipes and mufflers enables them to resist corrosion and extends the life of the system. Our mufflers, X-pipe, oem style stainless tailpipes, are also stainless constructed and precision matched to deliver the ultimate in sound and performance. Cad plated or stainless clamps, stainless hangers and polished stainless tips are available and included in most systems. These systems can be installed at home without any special tools. Details Crossmember-back Exhaust Utilizes X-pipe design Dual Exit Tailpipes 409 Stainless Steel Construction 2.5 inch inch mandrel bent pipe Street Pro Muffler Comes with catalytic converters Lifetime Limited Warranty Fits 1975-81 F body GM. Adding optional EVT58 or EVT59 will allow them to exit out the back straighter. Requires TGF10E tailpipe adapter kit for 76-81 TA with splitter tips EVT10. Catalytic Converters These EPA compliant catalytic converters are the best in the market in terms of performance, design, and longevity. Expect more power, improved MPG, superior emissions, and sound control. These converters are a made from a high quality 304 grade stainless steel. The ceramic substrate is a durable factory style design. These converters feature a 2.5 inch slip fit design with an overall length of 11 inch. The overall diameter is 4 inch. EPA Compliant USA Made Stainless Steel Construction High Platinum Load O2 Bung Equipped More Horsepower and Torque Increased Fuel Economy Lower Emissions Better Sound Control