2017-2023 Duramax Cylinder Head Gasket Grade C (55524)

Pulling the heads on an L5P is a big job, so the gasket that goes back on needs to seal right the first time. This MAHLE Grade C cylinder head gasket is a multi-layered steel (MLS) gasket built to OE specifications for the 2017-2023 6.6L L5P Duramax, sealing the head to the block under high combustion pressure. Grade C is the thickest of MAHLE's three L5P grades at 1.30mm (.051"), so confirm the grade your engine calls for before ordering.

Part Number: 55524

• Grade C thickness: 1.30mm (.051")
• Multi-layered steel (MLS) construction
• Built to meet OE specifications for the L5P 6.6L Duramax
• Fits either bank

• (1) MAHLE Grade C Cylinder Head Gasket

• Sold individually. A complete head job needs two, one per bank.
• MAHLE also offers Grade A (55522, 1.20mm) and Grade B (55523, 1.25mm). Measure piston protrusion or check with your engine builder to confirm the correct grade.
• Head gasket only. For the rest of the top-end reseal, see the MAHLE HS55522 Upper Engine Gasket Set.

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