Billetworkz Engine Bay Caps Zero Series Black 2015-2026 Subaru WRX with Fluid Engraving | BW-EBCZ-SUB-VAWRX-BLK-E GTR_1999-2002 More valve control equals more

More valve control equals more aggressive cam profiles

Easily handle boost pressures well beyond 30PSI

With a focus on rapid charge air cooling and optimized airflow paths

Spring Rate Front: 10K

- 75a Durometer Urthane Inserts

Billetworkz Engine Bay Caps Zero Series Black 2015-2026 Subaru WRX with Fluid Engraving | BW-EBCZ-SUB-VAWRX-BLK-E GTR_1999-2002 More valve control equals moreThese caps are designed to be factory replacement caps, not covers. CNC machined from 6061 aluminum and anodized for a durable and vibrant finish. The internal fitting from the OEM caps must be reused with these caps. They pry out carefully with gentle pressure and then snap into place. 2015+ WRX includes: Oil Cap Wiper Fluid Cap Coolant Overflow Cap Brake Fluid Cap