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Vehicles with an engine ECU (electronic control unit) experience a 2½ second delay when activating their exhaust brake circuit. Pacbrake’s ECM Bypass kit eliminates this delay with bypassing the computer system using a mechanical throttle switch mounted on the accelerator linkage.
2004.5 Dodge Cummins 5.9 Liter Manual Transmission(Trucks Built Jan 5,2004-July 25,2004)