GrimmSpeed Engine Bay Reservoir Cap Set for 2002-2021 Subaru WRX STi (GRM120069) Go Fast Bits Our BCS will eliminate boost

Our BCS will eliminate boost fluctuations inherent in OEM boost control systems

Combined with the knowledge and skill of H&R’s suspension engineers

(1) Carbon Fiber lip

even further (with a flattened regulation slope)

GrimmSpeed Engine Bay Reservoir Cap Set for 2002-2021 Subaru WRX STi (GRM120069) Go Fast Bits Our BCS will eliminate boostThe GrimmSpeed Engine Bay Cap Set offers a stylish upgrade from the unattractive yellow OEM caps on 2008 21 WRX and STI models. Available in black or red, this set includes six high quality plastic caps for various engine components, such as the Brake Master Cylinder and Coolant Overflow. These caps blend seamlessly with other GrimmSpeed parts and are more affordable than aftermarket billet options, enhancing both the look and functionality of your