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I belive my question now would be after i read it all, why do BMW install K&N air filters in their perfomance air intakes and claim an increase in HP as well as torque?
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M.Etreby
F M double Grills, 19"313, Perf.Exhaust with dimisatips, RPI red scoops, K&N filter, LUX-H8 160, Aluminum strut bar, PBX, Perf. Suspension, F30 M-Perf. Brakes
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