Several factors contribute to determining the ideal ignition coil for your vehicle and engine. Horsepower, compression ratio, fuel type, and boosted vs. naturally aspirated are a few of the common variables to consider when pairing a performance or race coil with your setup. To help simplify this, we've arranged coils into 6-Series Street/Strip, 7 & 8-Series Race, EFI Smart Coils, and Pro 600 categories based on MSD ignition family or series fit. Still unsure of which coil is right for your vehicle? Our friendly and knowledgeable tech experts are located right here at home in El Paso, TX, and are always willing to help and can be reached at 1-888-258-3835.