SHOULD work on all stock trucks + some modded ones (like autocar dc), please report mute engine or other problems. THE King of Detroit Diesel, THE 20V149 Designed mainly for haul trucks and for generating power for hospitals. 20 cylinder 48L behemoth producing 2936HP(2189Kw) - 4595lb-ft(6230Nm) @ 1800RPM, There is nothing it cannot pull. - 3 Engine blocks : 2x V6, 1x Special V8 - 3 Crankshafts - 6 Turbos - 3 Blowers ALL BOLTED TOGETHER 2 Variants 20V149 COM - Commercial version that strips this engine down to 710hp and 3400nm 20V149 TRU - True King version that runs full force 2936hp and 6230nm Confirmed working on 1.40 Open Beta, 1.39 should work too