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Ford Cummins Conversions - Fummins

FUMMINS CONVERSION COMPOUND KITS AND FUMMINS MANIFOLDS

Why a Cummins in a Ford?

Enthusiasts choose the Fummins swap for torque, longevity, and easy power. A 5.9 or 6.7 Cummins can turn a Super Duty into a reliable tow rig or a strong daily that still sips fuel.

Best engine choices:

  • 5.9 12-valve (1989–1998): Simple mechanical fuel system, great for budget builds and reliability.
  • 5.9 24-valve (1998.5–2002, 2003–2007): Strong base, better electronics support, easy to tune.
  • 6.7 (2007.5-2024): Big torque and modern drivability when set up right.
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