New AD Auto Parts High Performance Ignition Coil B148 For Lexus & Toyota Helps ensure proper engine performance, maximize fuel economy, minimize both tailpipe emissions and RFI electronic interference Coil Housing Engineered to withstand extremes in temperature without cracking Radio-Frequency Interference (RFI) Suppression minimizes electronic noise Helps avoid spark plug failure, drivability complaints, pre-ignition and detonation Insulation Multiple coats on the primary and secondary windings to ensure no internal arcing