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Product Fitment:
2002-2025 WRX
2004-2021 STI
2013-2026 BRZ
2013-2016 FR-S
2017-2025 86 / GR86
Upgrade your Subaru’s engine bay with the Billetworkz Coolant Reservoir Cap — a premium replacement for the factory plastic cap. CNC-machined from durable 6061‑T6 billet aluminum, it offers superior strength and heat resistance. The anodized or powder‑coated finish not only adds a refined custom look but also protects against corrosion over time. With a direct-fit design, this cap threads right into your stock reservoir without modifications, providing a secure, leak-free seal. It’s a clean, high-performance upgrade that pairs perfectly with other Billetworkz engine bay components.
Features & Benefits:
Made from 6061‑T6 billet aluminum for toughness and precision
Anodized or powder-coated finish for durability and style
Direct-fit OEM replacement — easy installation, no mods needed
Precise threading ensures a secure, reliable seal
Minimalist design boosts the visual appeal of your engine bay
Compatible with a variety of Subaru models
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