Features and advantages Multi-stage quality control process to ensure parts meet dimensional and weight specifications Core technologies include resin, cold and oil sands cores. Detailed core allows tighter tolerances and cleaner castings 100% Tested Metallurgy – Castings are designed to precise metallurgical standards for consistent quality, strength and performance Computerized machining leads to tight tolerance control Fit For 2007-2013 Nissan Altima Installation Tips .