VTT Billet Coolant Reservoir Cap – BMW
Upgrade your engine bay and eliminate the factory plastic with the VTT Billet Coolant Reservoir Cap. This CNC-machined aluminum cap replaces the OEM plastic unit, giving you strength, style, and long-term durability while retaining all OEM functionality. Simply snap the factory pressure-relief valve into place, and you’re ready to go.
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Premium Construction – CNC-machined from 6061-T6 aluminum.
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Factory Functionality – Accepts the OEM pressure-relief insert for proper venting.
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Cohesive Design – Matches our N5X Billet Oil Cap, N5X Billet Oil Filter Housing Cap, and Billet Power Steering Cap for a uniform, high-end look.
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Color Options – Available in Red, Black, Blue, and Clear anodizing.











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