This ported vacuum switch from Standard Motor Products is a perfect fit for 1981-1985 C/K trucks, P/G vans, and 1985-1986 Suburbans. It is designed to control the vacuum supply to various components in the exhaust and emission systems. The manufacturer part number for this product is PVS92. Please note that this product comes with no warranty and is a direct replacement for your current vacuum switch. It is important to verify the fitment type before making a purchase. As a reliable seller on eBay Motors, we are committed to delivering this high-quality product to you.