Spectra Premium Ignition Coils are designed and produced under strict quality control processes. From raw materials to the final assembly, every production process goes through rigorous testing requirements to ensure each product meets or exceeds Original Equipment (OE) specifications for fit, form and function. All these quality control procedures help ensure SPI ignition coils deliver consistent premium quality, performance and dependability. All of this combined with a Limited Lifetime warranty makes Spectra Premium the obvious choice.