Turbo Diesel Sleeper: 2015 Ford F-250 6.7L Power Stroke 🏁🛞 The 2015 model year was a pivotal milestone for Ford’s heavy-duty lineup. Marking a major hardware and calibration evolution for the 2nd-generation 6.7-liter Power Stroke V8, Ford upgraded to a larger GT37 single variable-geometry turbocharger and higher-capacity fuel injectors. The result turned the steel-bodied 2015 Ford F-250 Super Duty into a legitimate Turbo Diesel Sleeper—a rugged 3/4-ton truck with high-output V8 grunt and incredible aftermarket potential 🏁💀. The Verified Numbers 📊⚙️ 🫀 The Heart: The 2nd-gen 6.7-liter Power Stroke 32-Valve Turbo Diesel V8, featuring a high-strength Compacted Graphite Iron (CGI) block, aluminum cylinder heads, and high-pressure common-rail injection. 🌀 GT37 Variable-Geometry Turbo: Outfitted with an upgraded, larger Garrett GT37 VGT turbocharger replacing the earlier dual-boost setup for stronger top-end power and faster spooling. 💪 The Power: Pumping out an authentic 440 horsepower at 2,800 RPM and a mass