The PRO Series has lifetime backed stainless steel construction with a satin finish muffler and no tip, giving you the opportunity to customize it with an optional tip of your choice. Pro Series Performance Diesel Exhaust System; 5 in. Filter-Back; Incl. Tubing/Mid Pipe/Tailpipe/6 in. Polished Tip; Single Pass. Side Rear Exit; Stainless; The PRO Series Features stainless steel construction with a satin finish muffler and no tip. No hassle emissions legal design.