2-1/4-inch 16-gauge mild steel tubing with .065-inch wall thickness for easier welding. Mandrel bent tubing maintains inside diameter throughout exhaust pipe flow path. All tubing can be cut and easily welded at any bend radius due to mandrel bending process. Oil coating applied to prevent corrosion after manufacture that delivers clean, ready to weld tubing. Once cut and welded it is recommended to use high-heat paint or ceramic coating to protect exhaust. Each tubing piece includes an expanded end for easy slip-fit installation. Complete universal dual exhaust kit includes 16 pieces of tubing to build a complete custom exhaust system. Dual exhaust kit does not include mufflers, clamps, hangers, or any finished tips. Bent exhaust tubing features a 3-3/4-inch bend radius on all pieces. Included are (4) exhaust hanger brackets. Design Your Own Exhaust System with Our Complete Header Back Exhaust Kits Many builders look at the exhaust portion of a project build with skepticism and disdain. It is normally one of those aspects of a project where you know it is going to entail delivering your project vehicle to an exhaust fabricator and having a complete header to tailpipe custom exhaust system built at great expense. It is even more fun when you do not own a truck and trailer to transport said vehicle yourself too! However, we are here to tell you that you can indeed fabricate your own custom exhaust right in your home garage or workshop with ease using one of our complete dual exhaust pipe kits we offer here at Speedway Motors. All it takes is a welder, something to measure and cut the piping with, and a little bit of exhaust pipe system routing forethought to accomplish. Heavy Wall 16-Gauge Tubing for Easy Welding and Fabrication We start by spec’ing .065-inch thick 16-gauge mild steel tubing for our mandrel bent exhaust pipe kits. This steel is easier to weld by far when compared to standard 18-gauge steel normally used for exhaust tubing