Carrillo 9321 Pro-H Duramax Connecting Rods, 2001-2016 LB7/LLY/LBZ/LMM/LML

Part# DM6418H

$2,832.90 Includes Free Shipping.

WARNING: Cancer and Reproductive Harm - www.P65Warnings.Ca.Gov

Fits: 2001 thru 2016 Chevy Silverado/GMC Sierra 2500HD/3500HD LB7/LLY/LBZ/LMM/LML Duramax Diesel

The Carrillo 6.6L Duramax Pro-H Connecting Rod With H-11 Bolts is a must have in your 2001-2010 GM 6.6L Duramax engine build. Since 1963, Carrillo is recognized as the preeminent custom connecting rod manufacturer in the world. Carrillo has provided custom and prototype connecting rods to virtually every major automotive and motorcycle venue, most notably to the high performance and speed equipment industry. Carrillo uses proprietary chrome, nickel, moly, vanadium alloy which meets all VAR (vacuum arc re-melt ASTM standards). The heat is validated, both by the supplier and an independent metallurgist whom confirm the desired physical and chemical properties of steel.  All heat treat processes are via a mar-aged operation, resulting in UTS of 195,000 with a yield of 182,000 while maintaining the critical elements of low notch-sensitivity and ductility. All Carrillo connecting rods are manufactured from an oversized forging resulting in the proper grainflow as well as the surface removal of any potential inclusions or surface conversions generated by the forging process. All critical CNC machines at Carrillo are equipped with probing to accurately validate dimensional integrity. In the production process each part is magnafluxed at least twice, further each piece is Rockwell tested to validate the heat treat procedure. A final shotpeen operation completes the part. This connecting rod comes with H-11 bolts and is for use in a wide range of applications. 

Features and Specs:

  • Pro-H Design
  • Full set of 8 
  • H-11 Tool Steel Bolts 
  • Part Number: GM_B66DM_0HS_6418B7H
  • CC: (6.418 in.) (163.02 mm)
  • Style: Pro-H
  • Bolt Size: 7/16"
  • Bolt Type: WMC 
  • PE Width: (1.540 in.) (39.12 mm)
  • BE Width: (1.119 in.) (28.42 mm) 
  • BE Bore: (2.6372 in.) (66.985 mm)
  • Pin Size: 1.359
  • Total/Rotate/Recip (GR*): 1098/680/418
  • H-11 Tool Steel Bolts (220,000 UTS)


  • Weights and dimensions are for reference only. Actual weight may vary. All sets match to +/- 1 gram per end.
  • Possible fitment issue with OEM style replacement LML Pistons, some machine work may be needed
  • Rated up to 1800 HP