The 2015 Ford F-Series Super Duty with a second-generation 6.7-liter Power Stroke® V8 turbo diesel engine with reverse-flow that places the exhaust inside the engine’s V-shape while the air intake is positioned on the outside of the V to shorten airflow from the exhaust system to the turbocharger sitting between the engine’s cylinder banks also the turbo inside the engine’s valley helps isolate the engine’s hottest temperatures, improving performance and efficiency.