Comp Cams Ultra Pro Magnum Roller Rocker Arm for Cathedral Port Heads; 1.8 Ratio (10-19 6.0L Sierra 2500 HD)Find parts that fit my vehicle

Description. As LS engines continue to grow in popularity, COMP Cams has expanded its line of rocker arms to build components specific to LS applications. New Ultra Pro Magnum Rockers are made from investment-cast 8650 chromemoly steel, utilize upgraded trunnions and needle bearings over stock and are stronger, stiffer and more durable than the stock parts. They also feature a 1.8 ratio (compared to the stock rockers’ 1.7) and utilize a roller tip instead of a slider. The higher ratio and increased stiffness make these rockers a great option for increasing lift without changing cams. This increased stiffness, along with the upgraded trunnion package and roller wheel, also makes them a perfect choice when running aftermarket valve springs. The rockers are available in a bolt-down design that uses stock rocker stands and in a stud-mount option for customers looking for an adjustable valve train. The stud-mount version is perfect for individuals running mechanical lifters as well. COMP Cams LS Ultra Pro Mangum Rockers Arms are available for LS1, LS2, LS3, LS6 and LS-based truck engines and come in individual sets or kits featuring studs and guide plates. Kits do not include pushrods, but they are available separately.

Fitment:

• 2010 GMC Sierra 2500
• 2011 GMC Sierra 2500
• 2012 GMC Sierra 2500
• 2013 GMC Sierra 2500
• 2014 GMC Sierra 2500
• 2015 GMC Sierra 2500
• 2016 GMC Sierra 2500
• 2017 GMC Sierra 2500
• 2018 GMC Sierra 2500
• 2019 GMC Sierra 2500

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