Isuzu D-MAX (2017-2022) 4JJ1 3L Turbo Diesel 3' Stainless Steel DPF Delete PipeSKU: M3 179 Stainless Steel Performance DPF Delete Exhaust Upgrade for 2017 2022 Isuzu D MAX 3L 4JJ1 Turbo Diesel Problems with the DMAX 4JJ1 Diesel Particulate Filter are well documented. The DMAX 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 DMAX often the soot left behind after the burn cycle can build up and cause a permanent blockage and