The Emission System Check Valve is a device that prevents exhaust from forcing its way back through the air injection system, which would damage the pump and other components. Dorman's Emission System Check Valve is constructed to withstand the extreme under-hood conditions and function properly every time.

• Direct replacement for a proper fit every time
• Helps restore emissions system to proper operation
• Constructed of high quality materials for resistance to oil and heat
• Quality-tested to ensure trouble-free installation and durability