Duramax 6.6 Tow/Haul Series

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The DFC Diesel Tow/Haul Series engine comes standard with all the upgrades found in the Street Series model as well as several enhancements to make this engine perfect for towing, hauling and performance applications up to 500 HP.


Contains all upgrades of the Street Series and includes;

  • DFC long block assembly
  • ARP series 2000 head studs
  • Stage 2 Performance camshaft
  • Mahle Motorsports HD pistons
  • DFC HD push rods
  • Hamilton HD valve springs
  • Added dowels to crankshaft for harmonic balancer and trigger gear assembly


Built for 500HP
*Rated HP is measured at flywheel same as factory engine HP ratings

DFC can build a very durable and robust combination for your specific needs and all still backed with a 5 year 160,000km (100,000mi) parts and labor warranty. Make us your only choice for Duramax diesel engines in North America.

Tow/Haul and Tow/Haul HD series engines still come backed with a 5 year 160,000 km (100,000 mi) warranty however are considered a severe duty application and require more frequent service intervals as stated in warranty manual supplement for warranty coverage to be considered.