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Designed to meet OEM specifications
The longest-in-class free length helps prevent coil unseating at full articulation
Simple snap-on design for quick installation and removal
Each detent from S-H is a noticeable difference in ride
Sinister Diesel Coolant Radiator Surge Tank Cap 20-26 Chevy L5P Duramax DC-89363 Designed to meet OEM specificationsThe Sinister Diesel Coolant Radiator Surge Tank Cap is a direct fit replacement designed specifically for Chevy GMC trucks equipped with the Duramax L5P engine. Made from quality, corrosion resistant materials and engineered for a secure seal, this upgraded cap helps maintain proper cooling system pressure while keeping contaminants out of your coolant reservoir. Easy to install with no tools or modifications required, this surge tank cap is an
