CSF BMW F3X / F2X (N55) Race-Spec Oil Cooler B6 (2003-2005) the filler neck is 100%

the filler neck is 100% TIG-welded

G83 M4 Performance Style Front Ducts In Pre Preg Carbon Fibre are beautifully-crafted front vent upgrades that transform the front end of the G8X platform

Remus BMW M135i xDrive Cat-Back Non-Resonated Mid-Section is a hand-made mid pipe designed specifically to de-restrict airflow

The B-Tube design increases the heat transfer surface area by approximately 15% compared to conventional tubes

Multi-Louvered High Precision Staggered Fin Design on Both Ambient and Pressure Sides for Optimal Heat Transfer

CSF BMW F3X / F2X (N55) Race-Spec Oil Cooler B6 (2003-2005) the filler neck is 100%CSF, a recognized leader in automotive cooling technology, has developed the Race Spec Oil Cooler specifically engineered for BMW's N55 engine series. Building on their extensive experience and proven success with BMW cooling solutions, CSF presents an advanced oil cooling system designed to meet the rigorous demands of track and performance driving. This product is tailored to maintain optimal oil temperatures, thereby enhancing engine reliability