INDUSTRIAL INJECTION MS-2218HX GM DURAMAX MAIN BEARINGS — 2001–2016 6.6L (LB7/LLY/LBZ/LMM/LML) — HX SERIES (+.001 OIL CLEARANCE)

Lock in reliable oil film under big power. INDUSTRIAL INJECTION MS-2218HX is an HX-Series main bearing set for the 2001–2016 GM 6.6L Duramax. The HX spec provides approximately +.001" extra oil clearance versus standard H-Series—ideal for performance builds, higher RPM, tighter crank fillets, and thicker oil. Built on proven MAHLE/Clevite H-Series geometry for competition-grade durability.

Fitment

• 2001–2004 LB7 6.6L Duramax
• 2004.5–2005 LLY 6.6L Duramax
• 2006–2007 LBZ 6.6L Duramax
• 2007.5–2010 LMM 6.6L Duramax
• 2011–2016 LML 6.6L Duramax

What’s Included

• Complete set of main bearing shells (upper & lower) for one 6.6L Duramax

Key Features

• HX clearance: approx. +.001" extra oil clearance vs. STD H-Series
• H-Series performance design: medium eccentricity, high crush, enlarged chamfers for large crank fillets
• Tri-metal construction engineered for high load & RPM
• Race-proven choice for builds that need added bearing clearance and oil film stability

Recommended Parts (CPP internal links)

• MAHLE TW-610S Thrust Washer Set (required, sold separately)
• MAHLE CB-1805H H-Series Rod Bearings (STD)
• MAHLE SH-1999S Camshaft Bearing Set (01–13)
• Shop All Duramax Main Bearings & Related

Cross-Reference / Alternatives

• MAHLE MS-2218H (STD clearance)
• MAHLE MS-2218HX (STD + .001, non-coated)
• Industrial Injection PDM-MS-2218HC (H-Series, coated)
• Industrial Injection PDM-MS-2218HXC (HX-Series, coated)

Helpful Notes

• Always measure housing bores and crank journals; set main oil clearance and thrust endplay to your build spec.
• HX extra clearance often pairs well with higher-viscosity oil and performance oil pumps—confirm for your application.
• Replace thrust washers whenever you service main bearings.

FAQ

HX indicates an H-Series bearing with approximately +.001" additional oil clearance compared to standard H-Series.

Yes. The Duramax uses separate thrust washers; use TW-610S with any MS-2218* main bearing set.

Yes—LB7, LLY, LBZ, LMM, and LML platforms (2001–2016) are covered.

Choose HX when you need a touch more oil clearance due to crankshaft fillets, bearing/cap alignment, higher RPM, thicker oil, or tighter operating temps.