This pipe kit removes the SCR (Selective Catalytic Reduction) and DEF/Urea system from your Cab & Chassis vehicle. You will need to measure from the cab to the axle; If it is over 70", then purchase this kit. If it measures up to70", then purchase PART NUMBER# 21128.
NOTE: This is the second pipe kit required when doing a DPF/DEF delete on Cummins Cab & Chassis vehicles. The first pipe kit would be PART NUMBER# 21126 (Kit with no muffler) or PART NUMBER# 21127 (Kit WITH a muffler).
