Holstein Positive Crankcase Ventilation (PCV) Valves are direct OE replacements for these critical engine components, offering perfect fit, form and function for flawless operation that restores your vehicle to factory levels of performance. Precision engineered valve exactly duplicates the function of the OE component - ensuring smooth, powerful engine performance and maximum fuel economy. Manufactured with premium materials that ensure rugged, long-term performance and the heat resistance necessary to withstand high engine operating temperatures. Exact OE connection points ensure a trouble-free installation process. Backed by Holstein's 3 year/36k mile warranty - we believe in our parts and our warranty shows it!