Ben Francis of Buddy Built Performance breaks down his turbocharged 6.7L Cummins diesel build, covering the Fleece Performance Engineering-based engine, single 88mm turbo, fueling strategy, drivetrain upgrades, and the reliability-focused approach behind his 5.90-class drag racing combination in this newest Diesel of the Week sponsored by AMSOIL INC. https://www.enginebuildermag.com/2026/01/ben-francis-turbocharged-6-7l-cummins-engine/ #engines #enginebuild #enginebuilding #diesel #dieselengine

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