Improving your diesel engine's exhaust sound is about fine-tuning the tone ... However, if you decide to switch to a cat-back or a turbo-back system, the cost of replacing the axle-back setup ...
Cummins’ 6.7-liter Turbo Diesel advanced engine system and powertrain will ... and greater confidence under towing conditions. Noise, vibration and harshness were also improved using helical ...