BMW Engine Coolant Reservoir Cap X3 (F25) you’ll finally hear the turbos

you’ll finally hear the turbos spool the way they were meant to

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

Anodized Black Lightweight Aluminum

Made of 304SS

smoother bends and removing the obstructive catalyst

BMW Engine Coolant Reservoir Cap X3 (F25) you’ll finally hear the turbosThe 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