Chevrolet Silverado Upper Coolant Pipe by Wehrli – Kiwi Green. Upgrade the factory rubber upper radiator hose on 2020–2025 6.6L Duramax L5P trucks to a precision aluminum hard pipe with a tough powder-coated finish.

Built to fit stock Silverado 2500/3500 L5P models using the OEM GM radiator, this pipe refreshes the engine bay and delivers durable, repeatable clamping with included stainless steel T-bolt clamps. The kit retains factory routing, installs with basic hand tools, and includes high-temp silicone boots. Note: designed for use with the OEM radiator; some aftermarket radiators may cause fitment issues. Replaces GM part numbers 84813629 and 85122989.

Features

• Fabricated aluminum upper coolant pipe
• Durable Kiwi Green powder coat
• Stainless steel T-bolt clamps and silicone boots
• Direct fit for 2020–2025 Silverado 2500/3500 6.6L Duramax L5P with OEM radiator
• No vehicle modifications required; installs with basic hand tools
• Replaces GM 84813629 and 85122989

Questions or planning a build? Call our Austin shop at 512-982-9393 (TX) or our Los Angeles area shop at 562-981-6800 (CA). We offer installation and customization services at both locations.

Buying multiple items? Contact us for shipping discounts. We install on premises at both locations.

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