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Tune a stock truck, you raise the cylinder pressure, that is why most of us use head studs since the raised cylinder pressure is more than the torque to yield head bolt can handle. A stock 6.0L has more HP and better transmission than a chipped 7.3L you are used to.
Yes you can tune a 6.0L but be aware of Pay to Play if you tow with added HP on stock head bolts.
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level
Slideshow: The VelociRaptor Expedition gains a lift, upgraded suspension, Brembo brakes, and trail-ready equipment while retaining the stock 440-horsepower EcoBoost V6.
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.