Madza BT-50 (2022-2025) 4JJ3 3L Turbo Diesel 3' Stainless Steel DPF Delete PipeSKU: M3 179 Stainless Steel Performance DPF Delete Exhaust Upgrade for 2022 2025 Madza BT50 3L 4JJ3 Turbo Diesel The Madza BT50 runs an active DPF system that traps harmful diesel particulates in a honey comb structure, and then burns them off as the DPF flow is reduced. In the Madza BT50 often the soot left behind after the burn cycle can build up and cause a permanent blockage and expensive failure Signs your DPF is failing include reduced engine