BMW Engine Coolant Reservoir Cap X3 (F25) smoother bends and removing the

smoother bends and removing the obstructive catalyst

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

Ethanol Compatibility: Yes

and includes a reusable high flow inverted cone filter

5 LPM): Our Stage 2

BMW Engine Coolant Reservoir Cap X3 (F25) smoother bends and removing theThe 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