Side Head Gasket

Features:

• OE-quality replacement for left cylinder head
• Designed for 6.6L Duramax 2001–2016 engines
• Maintains factory compression and sealing integrity
• Helps reduce emissions and oil consumption
• Engineered for high-performance diesel applications
• Supports increased torque and engine output
• Resistant to heat and combustion pressures
• Trusted by professional engine builders
• Manufactured with strict quality control standards
• Compatible with Silverado and Sierra 2500HD/3500HD
• Reliable sealing for daily and heavy-duty use
• Made by Mahle, an OE gasket leader

Keep Your Duramax Sealed Strong With Proven Mahle Quality

When it's time to tear down the top end of your Duramax, the last thing you want is to cut corners on your head gasket. The Mahle 54580 Left Side Head Gasket gives you the confidence of OE-level sealing built for real-world diesel power. Whether you're doing a full engine rebuild or fixing a blown gasket, this Mahle unit is engineered to keep combustion pressures contained and cooling systems tight under load. It’s built with the same materials and specs trusted by GM on the assembly line, so you’re getting a part that fits perfectly and holds strong under extreme conditions. From towing heavy trailers to long hauls across country, this gasket delivers the performance and durability your 6.6L Duramax demands. Plus, Mahle’s deep experience in OE technology means you’re getting more than just a replacement, you’re getting a long-term solution. For guys who want to do it once and do it right, this is the gasket that gets the job done.

Engineered To Handle The Demands Of Diesel Power

The Mahle 54583 Left Side Head Gasket is designed specifically for 2001–2016 GM Silverado and Sierra 2500HD/3500HD trucks equipped with the 6.6L Duramax diesel engine. As part of Mahle’s extensive OE-grade lineup, this gasket maintains factory compression levels and ensures reliable sealing between the cylinder head and engine block. It is constructed using multi-layered materials that withstand high cylinder pressures and elevated combustion temperatures commonly found in turbo diesel applications. The gasket plays a critical role in managing emissions, helping reduce oil and coolant consumption while supporting clean, efficient combustion. With durability suited for both stock and performance builds, it’s ideal for trucks that see daily use, heavy towing, or extended service intervals. Each unit is produced under strict quality control standards, ensuring a precise fit and consistent performance. Backed by Mahle’s long-standing reputation in the OEM and motorsports world, this gasket brings peace of mind to any Duramax rebuild or repair.

Fits: 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Notes:

• Fits 2001–2016 GM Silverado/Sierra 2500HD and 3500HD with 6.6L Duramax
• Designed specifically for the left side cylinder head
• Manufactured to OE specifications for precise fit
• Multi-layered construction handles high combustion pressure
• Ideal for both stock and performance Duramax engines
• Supports improved torque and engine efficiency
• Engineered to help reduce emissions and oil usage
• Trusted by professional engine builders and repair shops
• Not a universal gasket, side-specific fitment required
• Best installed during a full top-end rebuild or repair
• Always confirm left side placement before ordering
• Backed by Mahle’s reputation for OE-grade reliability