BMW Engine Coolant Reservoir Cap X3 (F25) Improved Throttle Response: Experience quicker

Improved Throttle Response: Experience quicker acceleration and a more responsive throttle

Ethanol Compatibility: Yes

Anodized Black Lightweight Aluminum

and includes a reusable high flow inverted cone filter

BMW Engine Coolant Reservoir Cap X3 (F25) Improved Throttle Response: Experience quickerThe Precision Raceworks Engine Coolant Reservoir Cap is a functional and stunningly stylish way to add a nice touch to any engine bay! This cap come in three color options so there is always a color that will work for you! Black with Billet, Black with Blue, and the Stealth series (all black). Many people don't realize it but the OEM caps have a pressure release valve built into them. Often times aftermarket companies don't know this either or just