WHAT SIZE IS AN MBRP EXHAUST?
All MBRP diesel exhaust systems use 4″ or 5″ pipe depending on the kit. Some of the diesel systems come with a 3.5″ down pipe due to fit issues. MBRP single systems for gas powered trucks use 3.5″ tail pipes while the Cool Dual” systems use 2.5″ tail pipes. The front pipes on the MBRP Sport Truck systems vary from 2.5″ to 3.5″ depending on the size of the factory exhaust.