2004-2013 BMW 1 Series E81, E82, E87, E88, 1M MMR Oil Filler Cap Black Assembly. 2004-2013 BMW 1 Series E81, E82, E87, E88, 1M, E82 MMR Oil Filter Housing Black. The core itself uses internal turbulators to improve its cooling performance and the CFD optimised end tanks assist with maintaining the best possible airflow across the core.
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