Cat Back Exhaust System Dual Split Rear Aluminized Steel For 09-21 Toyota Tundra 5.7L MBRPAluminized Steel 2. 5 Inch Cat Back Dual Split Rear Cat Back, Dual Split Rear, Aluminum Built from heavy duty Aluminized Steel our Installer Series performance exhaust systems offer a value price without compromising on the quality built into every component. While the seams are a major point of rust through with some budget systems our fully sealed tubing adds years to your system. Constructed to the same specifications as our top of the line Pro