4" Exhaust Muffler Pipe Tube for Chevrolet Silverado GMC Sierra 6.6L Duramax Diesel 2011-2015 GenericProduct Overview Eliminates the need for routine DPF maintenance such as cleaning or replacement Prevents potential DPF failures that can lead to costly diesel engine repairs Reduces exhaust backpressure, improving exhaust flow and overall engine performance When combined with an ECU remap, delivers noticeable gains in power and torque across all vehicle types Specifications: Condition: 100% Brand New Materials: Stainless Steel Thickness: 2mm Inlet