Product Details: Equip your truck with improved exhaust control, with the OTR 4" x 10' Carbon Steel 16-Gauge Exhaust Stack Pipe with Expertise Built In™. To reduce backpressure while dissipating heat, this replacement HVAC component features an elongated design that redirects the emissions away from a vehicle. Constructed with premium materials to deliver long-lasting reliability. FleetPride is your First Click in Heavy Duty®.