Billetworkz Coolant Overflow Cap Engraved Zero Series Purple Subaru WRX 02-26 / STI 04-21 5500 and last longer than most

and last longer than most OEM pads

Factory splitter retained: Restricts airflow across the larger core

Brian Crower's 4G63 stroker kit utilizes heavy duty premium steel billet connecting rods

Each kit is designed for straightforward integration into Subaru fuel systems and includes:

Spring / clamp style slip-joint flanges (lighter than traditional flanges)

Billetworkz Coolant Overflow Cap Engraved Zero Series Purple Subaru WRX 02-26 / STI 04-21 5500 and last longer than mostProduct Fitment: 2002 2025 WRX 2004 2021 STI 2013 2026 BRZ 2013 2016 FR S 2017 2025 86 GR86 Upgrade your Subarus engine bay with the Billetworkz Coolant Reservoir Cap a premium replacement for the factory plastic cap. CNC machined from durable 6061T6 billet aluminum, it offers superior strength and heat resistance. The anodized or powdercoated finish not only adds a refined custom look but also protects against corrosion over time. With a direct fit