MAHLE CB-1805H-.25MM H-SERIES ROD BEARING (.025MM) FOR 2001-2016 GM 6.6L DURAMAX ENGINE

The MAHLE CB-1805H-.25MM is a high-performance connecting rod bearing designed for the 2001–2016 GM 6.6L Duramax diesel engines, including LB7, LLY, LBZ, LMM, and LML variants. This bearing is part of the H-Series line, known for its durability and performance under high-stress conditions.

? Product Overview

• Part Number: CB-1805H-.25MM

• Type: Tri-metal construction (TM-77)

• Material: Aluminum with hardened steel back and thin overlay

• Design: Medium eccentricity, high crush

• Size: Undersize by 0.25mm (0.0098")

• Quantity: Sold individually; 8 required per engine

• Fitment: 2001–2016 GM 6.6L Duramax (LB7, LLY, LBZ, LMM, LML)

⚙️ Specifications

• Housing Bore: 2.6372" – 2.6378" (66.9849mm – 67.0001mm)

• Shaft Diameter: 2.4764" – 2.4772" (62.9006mm – 62.9209mm)

• Max Length: 0.934" (23.7236mm)

• Max Wall Thickness: 0.0795" (2.0193mm)

?️ Features

• High Load Capacity: Withstands over 60% higher loads compared to competitor bearings.

• Durability: Exceeds light vehicle OE durability requirements of 150,000 miles and heavy vehicle OE durability requirements of 300,000 miles.

• Seizure Resistance: Offers up to 40% better seizure resistance than competitors' engine bearings.

• Forgiving Surface: Provides a superior surface for forgiveness, beneficial in poorly maintained engines.

The MAHLE CB-1805H-.25MM H-Series Rod Bearing is engineered for superior performance in the demanding environment of 2001–2016 GM 6.6L Duramax diesel engines. This high-quality tri-metal bearing, crafted from aluminum with a hardened steel back and a thin overlay, is designed to deliver exceptional durability and reliability for your engine's connecting rods. The medium eccentricity and high crush design ensure a precise fit and optimal performance under heavy loads.

This undersized bearing, measuring 0.25mm (0.0098 inches), is essential for maintaining the integrity of your engine while providing a perfect balance between strength and flexibility. With a housing bore specification ranging from 2.6372" to 2.6378" and a maximum length of 0.934", the MAHLE CB-1805H-.25MM ensures compatibility with LB7, LLY, LBZ, LMM, and LML Duramax engine variants.

Engineered to outperform standard bearings, this product withstands over 60% higher loads while exceeding OE durability benchmarks—showing resilience for 150,000 miles in light vehicles and an impressive 300,000 miles in heavy-duty applications. Additionally, its advanced seizure resistance—40% better than competing bearings—offers peace of mind, particularly in high-stress situations or poorly maintained engines.

MAHLE’s dedication to quality extends to its forgiving surface, designed to adapt to imperfections, making it a reliable choice for any engine rebuild. Sold individually, a total of eight are required per engine, ensuring you have exactly what you need for your next project. With its combination of robust materials, advanced engineering, and exceptional performance standards, the MAHLE CB-1805H-.25MM H-Series Rod Bearing is a must-have for any serious mechanic or enthusiast looking to enhance the durability and efficiency of their Duramax engine.