XDP HD Rocker Arm Shafts for 2001-2024 GM 6.6L Duramax (LLY/LBZ/LMM/LML/L5P)

The XDP HD Rocker Arm Shafts are engineered to tackle the common oiling issues experienced in the 2001-2019 GM 6.6L Duramax engines. Unlike factory shafts that often face lubrication failures, our advanced design ensures that oil flows smoothly, reducing wear on your valvetrain and extending the lifespan of your engine—especially beneficial for those pushing their engines to the limits of performance and reliability.

• CNC Machined for Precision Fit
• .250 inch Wall Thickness for Enhanced Strength
• Manufactured from Durable 4130 Chromoly Steel
• Revised Oil Grooves for Consistent Lubrication
• Easy Installation with Threaded Pipe Plugs for Maintenance

Fitment:

2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019 Chevrolet Silverado 2500 HD

2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019 Chevrolet Silverado 3500 HD

2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019 GMC Sierra 2500 HD

2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019 GMC Sierra 3500 HD

XDP is a leading retailer and manufacturer known for offering top-quality OE, OER, and aftermarket diesel parts and accessories. With over two decades of service to the diesel community across North America, we remain committed to providing exceptional products to meet the needs of your vehicle—whether for work, play, or hauling. Trust XDP for your diesel performance upgrades!