The system uses mandrel bent 3" tubing up to the axle and mandrel bent 2.5' on the way out. It also uses a 3.5' stainless steel single wall with rolled end tips. The chrome or black aluminized steel exhaust tips provides nice contrast against the steel system. The system's wide-open throttle uses a smooth climbing note with an uplifting groan. This mild and deep tone sounds great when you cruise down the road or trail. Give your truck the sound and tough look you've always wanted and pick up the MBRP Exhaust System.