Main Crankshaft Seal Driver Kit Front & Rear for LB7 LLY LBZ LMM LML, 01-16 GM 6.6 6.6L Duramax Diesel

Works very well, but I didn't spring for the more expensive installer, so I have no basis for comparison. It installed the front and real crankshaft seals without any problems, and will now sit in my toolbox for another couple years before I need to use them again.

It worked grate on the rear mane did not use the frunt mane seal

They work great

Replacing the main seal on a duramax