Spectra Premium Heaters are Original Equipment quality with 100 percent quality assurance. Only the highest grades of materials are used in production to ensure product longevity. The fully brazed aluminum design is available for more than 95 percent of aftermarket demand. All heater cores are 100 percent leak tested and drop-in fit for easy installation. Spectra Premium Heaters are designed for exact fit in the vehicle's Original Equipment heater casing.