Description:

- IGNITION COILS FITMENT - coil packs for Pontiac for Bonneville 04-05 for Cadillac for DeVille 04-05 for Cadillac for Seville 04 for Buick for Lucerne 06 for Cadillac for STS 05-06 for Cadillac for XLR 04-05 for Cadillac for SRX 04-06. - COIL PACKS PART-NUMBERS - Ignition OE D596A,UF564,12594176,099700-0940,12594176,099700-0940,C1556. - How an Ignition Coil Works - Ignition coils purpose is to provide the high voltage needed by the ignition system to fire the spark plugs. The spark plug needs about 15,000 to 20,000 volts of electricity in order to form an electric spark that can ignite the fuel. If you dont have strong ignition coils then it will result in weak fuel consumption or engine misfires. - Causes of ignition coils damage - Ignition coils can go bad due to problems with spark plugs and plug wires, abnormal spark plug gaps, and overheating and excessive vibration. - Our coil packs is the best choice - Our ignition coils are made of the highest quality copper and feature a unique winding design that reduces weight and size without sacrificing quality. Due to the lightweight design, each coil is easy to install.