The systems guarantee to deliver superior quality, sound construction, and perfect fitment. The stainless steel systems are ideal replacements for your small and restrictive exhaust, they will instantly improve air flow and slash backpressure. They come packaged with all you need to complete the installation process. Inlet4 in. OutletIncl. Head-Pipe Assy/Intermediate Pipe/Tailpipe/Muffler/5 in. Dbl. Banks Power was founded more than 50 years ago, and has since then become widely recognized as a premier designer and manufacturer of power-enhancing products for both diesel and gaspowered light trucks, motorhomes, and sport-utility vehicles.