Product Description
Race-bred durability for your 6.6L Duramax bottom end. INDUSTRIAL INJECTION’s HX Series coated main bearings (STD + .001" extra oil clearance) are built on Clevite H-Series race shells and coated for added protection during cold starts and high-load abuse. Ideal for performance street builds, towing compounds, and competition engines.
Fitment
- 2001–2004 LB7 6.6L Duramax
- 2004.5–2005 LLY 6.6L Duramax
- 2006–2007.5 LBZ 6.6L Duramax
- 2007.5–2010 LMM 6.6L Duramax
- 2011–2016 LML 6.6L Duramax
What’s Included
- Complete coated main bearing set (upper & lower shells) — STD + .001" oil clearance
Key Features
- HX (H-Series, extra clearance) for high oil film stability under load
- Race-proven Clevite H-Series design: medium eccentricity, high crush, enlarged chamfers
- Friction-reducing coating for added scuff/abrasion resistance
- Designed for performance street, towing, and competition use
Recommended Parts (CPP Internal Links)
- MAHLE TW-610S Thrust Washer Set (01–16 Duramax)
- MAHLE/Clevite CB-1805HX Rod Bearings (STD + .001)
- MAHLE SH-1999S Camshaft Bearing Set (01–13)
- MAHLE MS-2218HX Main Bearings (STD + .001) — Non-coated alt.
- Shop All Duramax Main Bearings
Helpful Notes
- Measure everything. Verify housing bore and journal sizes; set main bearing oil clearance and thrust endplay to spec.
- Use TW-610S thrust washers with any MS-2218* bearing set; replace if worn.
- Extra clearance (HX) typically pairs well with higher-viscosity oil and performance oil pumps—confirm for your build.
Cross-Reference / Alternatives (CPP Internal)
FAQ
What does HX (STD + .001") mean?HX is an H-Series bearing with approximately .001" additional oil clearance versus standard H-Series. It helps maintain a stable oil film at elevated power, load, and temperature.
Do I need to replace the thrust washers?Yes—whenever the crank is out, install a new TW-610S set and verify endplay.
Are these coated?Yes. Industrial Injection supplies these as coated HX series bearings for added scuff resistance and margin during startup.
Will these fit all 2001–2016 6.6L Duramax platforms?Yes—LB7, LLY, LBZ, LMM, and LML. Always measure and confirm clearances for your specific crank/block.
