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The ARP upper rocker cover bolt kit for GM Duramax LLY–LMM 6.6L supplies replacement bolts for the upper rocker covers. Intended for Duramax valvetrain maintenance, the kit gives the correct fasteners to reinstall or service upper covers on LLY and LMM 6.6L engines, simplifying cover removal and reassembly during repairs or scheduled maintenance.
ARP GM Duramax LLY-LMM 6.6L upper rocker cover bolt kit
