Introducing the HSP Billet Oil Fill Cap for your 2011-2016 Duramax OR trucks equipped with an HSP Oil Fill Neck Precision-machined from durable 6061 Billet Aluminum, this cap enhances the visual appeal of your engine bay and ensures lasting performance.

We provide a new O ring to achieve the perfect seal on your truck's oil fill neck and trouble-free installation. Engineered to complement other HSP products, this cap can also be coated in any of our standard or custom powder coat options.

What comes with the HSP Oil Fill Cap for 2011-2016 Chevrolet/GMC Duramax and HSP Oil Fill Necks?

• (1)HSP Oil Fill Cap-Raw
• (1)O-ring seal

What Does The HSP Oil Fill Cap for 2011-2016 Chevrolet/GMC Duramax and HSP Oil Fill Necks Fit?

• 2011-2016 GMC Sierra 2500
• 2011-2016 GMC Sierra 3500
• 2011-2016 Chevrolet Silverado 2500
• 2011-2016 Chevrolet Silverado 3500
• Trucks Equipped With HSP Oil Fill Neck (041-HSP kit)
• LML: 2015-2016 8th digit VIN Code 8

Special Note:

• This cap only fits factory oil fill necks on 2011-2016 Duramax engines OR trucks equipped with an HSP forward facing thermostat housing/oil fill neck kit.

HSP No BS Limited Lifetime Warranty
At HSP we believe in our products and we stand firmly behind every single one that leaves our facility. For years we have taken care of almost everything and anything that our customers had issues with, but we didnt have a set in stone warranty. We have always gone above and beyond for our customers which set us apart from the rest. We will continue that same standard, but now we are taking things to the next level.