Fel-Pro

Fel-Pro MLS Head Gasket LH .010 in. Thicker GM 6.6L Duramax Diesel - Single

SKU: fel26405PT UPC: 614046954533
Backordered – call for lead time

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Expected ship time: usually within 24–48 hours; some vendor items may take longer.

Call: (503) 235-1947 | Email Us: info@dfispdx.com

$112.22

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Verified Fitment & Application Support

This product is selected for proper fitment and compatibility with the listed engine application. Our team is available to assist with fitment questions, installation considerations, and supporting components to ensure a smooth install and reliable performance.

Got Questions? Feel free to email us or call us at (503) 235-1947

Thicker left-hand head gasket for the 6.6L Duramax, measuring .010 in. above the standard Fel-Pro replacement. Fel-Pro specifies this version for blocks that have been over-bored and deck milled, and it covers all gasket grades and model years.

Key Features

  • PermaTorque MLS construction using multiple layers of stainless steel to maintain sealing stress and accommodate head lift
  • LaserWeld stopper layer helps build a stronger combustion seal and resists blow-out damage
  • Proprietary coating seals surface finishes as rough as 80 Ra
  • Embossed sealing beads at all vital areas to close off leak paths
  • Designed to resist over-compression of the embossments under peak combustion pressure and temperature

Fitment

  • 2001-2016 Chevrolet Silverado / GMC Sierra 2500 HD
  • 2001-2006 Chevrolet Silverado / GMC Sierra 3500
  • 2007 Chevrolet Silverado / GMC Sierra 2500 HD and 3500 Classic
  • 2007-2016 Chevrolet Silverado / GMC Sierra 3500 HD
  • 2006-2016 Chevrolet Express / GMC Savana 2500 and 3500
  • 2009-2016 Chevrolet Express / GMC Savana 4500
  • 2003-2007 Chevrolet Kodiak / GMC TopKick C4500 and C5500

Product Details

  • Brand: Fel-Pro
  • Manufacturer Part Number: 26405 PT
  • Position: Left-hand cylinder bank
  • Thickness: .010 in. thicker than the standard 26401 PT
  • Construction: Multi-layer stainless steel (PermaTorque MLS)
  • Sold individually. The right-hand bank uses 26406 PT.
  • If the block has been over-bored only and not deck milled, Fel-Pro specifies 26401 PT / 26402 PT.

Orders typically ship within 24–48 hours of being received, but because of vendor shipping times some orders may take longer. We ship within the United States only (48 contiguous states plus DC).

Shipping Height: 0.12

Shipping Length: 22.5

Shipping Width: 9.5
California Proposition 65
WARNING: This product can expose you to chemicals that are known to the State of California to cause cancer and/or reproductive harm. For more information, visit www.P65Warnings.ca.gov.