Dinan Ignition Coils are designed to be a direct plug-and-play replacement, or upgrade, to factory coils and provide greater energy output. With up to 10% more energy output then stock you are ensured a stronger and more consistent spark. Whether you are replacing dilapidated coils that are causing sluggish acceleration and/or misfires or simply upgrading for a more reliable and consistent spark your ignition system will be more efficient with a new set of Dinan coils. For those that like to showcase engine modifications they even come in a variety of unique housing colors to choose from for that personalized touch! The B series style coil applies to the following engines: B36, B38, B46, B48, B58 and S58. Compatible OEM Part #Cross Reference: 12138643360, 12137619385, 12138678438 and 750990012. Blue - B36/B38/B46/B48/B58/S58