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the open space created from removing the factory OEM muffler can be covered for undercarriage aerodynamics
One of the first things to note about the OE exhaust manifold are the several points where flow is decreased due to a neckdown in piping diameter
The BMW E8X/E9X gives you all of that
In addition to the standard type
aFe Magnum FLOW OE Replacement Air Filter w/ Pro 5R Media (10-10080) 1575 the open space created fromMagnum Flow Pro 5R Round Straight Blue Air Filter (10 10080) by aFe. Constructed with 100% polyurethane on top and bottom, this high flow, oiled OE replacement performance filter will outflow stock paper filter for improved horsepower and torque. Five layers of progressively finer mesh cotton gauze media provide maximum airflow for best performance results. Washable and reusable for multiple cleaning cycles, the tall open evenly spaced pleats provide
US$ 18.95
US$ 129.00
US$ 13.59