Mishimoto 15-20 Subaru BRZ Four Cylinder Ignition Coil SetThe basic requirements for a properly running engine are fuel, air, compression, and spark. Before increasing the power of your flat four, it is wise to ensure all maintenance is up to date and these processes are performing as intended. Weak spark from your ignition system can result in misfiring under high load driving, and spark blow out, which hinders performance. Mishimoto is proud to launch our new lineup of ignition coils, aimed at providing