Billet Aluminum Upper Valve Cover for Duramax LLY-LBZ-LMM engines.

• Uses stock bolts, gaskets and grommets.

• Sold as a pair.

• Optional drill and tap for -12 AN breather holes. 

• These are machined to a mirror like finish. Choose the polished option for that extra bit of sparkle.

This is what all of the best dressed Duramax engines are wearing this year!