2020-2022 Duramax Large Coolant Reservoir Dress Up Cap (DUR-ENG-0401)

Transform the look of your engine bay by replacing dull factory plastic with high-quality billet aluminum. The primary coolant reservoir is one of the first things you see when the hood is up, and this dress-up cap is the perfect way to add a custom-shop finish to your build.

Machined with precision, this cover is designed to press-fit or glue directly onto your OEM cap. This ensures you keep 100% of the factory pressure-relief performance and safety standards while gaining 100% of the rugged, industrial look your truck deserves. It’s a simple, reliable, and inexpensive detail that makes a massive impact.

Part Number: DUR-ENG-0401

Why Shop Dirty?

• Canadian-Made Performance: High-performing parts made in-house in our shop in West Kelowna and sourced from across North America with the highest quality standards
• Born in the Shop: Our parts are engineered with real-world experience. Whether it's an OEM fix or a performance upgrade, we build what we know works. We make our parts to solve real-world problems.
• Dirty Made Quality: Our kits are trusted by shops across Canada because we design with the end user in mind. We aren’t just designing the kits; we are installing them every day in our own shop. We use our own products every day. From the first weld to the last bolt, we build tough gear that actually fits, handles abuse, and looks the part.

• CNC machined from premium billet aluminum for a precise fit and superior durability.
• Designed to slide directly over the factory cap for an instant aesthetic upgrade.
• Retains all factory venting and safety functions of the OEM coolant cap.
• Resistant to high engine bay temperatures and chemical exposure.

• (1) Dirty Billet Aluminum Large Coolant Reservoir Cap Cover

Click here for instructions

GM 13502353