The Cummins 3926126 Rear Main Seal with Repair Sleeve is your top choice for maintaining peak performance in your 5.9/6.7 Cummins engines. This direct-fit replacement ensures a precise fit and optimal function, thanks to its robust construction and durable materials. The included repair sleeve is designed to restore worn crankshaft surfaces, offering a comprehensive solution for both routine maintenance and replacement needs. Trust the Cummins 3926126 for reliable performance and longevity.