N55 & S55 Ignition Coil Upgrade KitIn stock! This kit is for BMW N55 & S55 engines. Check out our ignition coil testing methods and results here! Compared to the stock N55 and S55 ignition coils the B58 coils are capable of producing 2. 3x the energy output while providing a longer spark duration than the Precision Raceworks N55 coils. The B58 coils are a coil on plug design that removes the need for additional spark plug wires and utilizes the same mounting location as the stock coils
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