Brand: Allstar Performance Manufacturer's Part Number: ALL34146 Part Type: Crankcase Evacuation Replacement Components Product Line: Allstar Performance Replacement Check Valves Automotive Fittings Part Number: AAF-ALL34146 UPC: 848238072693 Crankcase Evacuation Component Type: Check valve Welding Required: No Quantity: Sold individually. Notes: Replacement check valve for Allstar or other crankcase evacuation systems. Description: Allstar Performance replacement check valves are for your crankcase evacuation system. You'll experience reduced crankcase pressure for optimum piston ring seal, fewer oil leaks, and better engine performance when all the components are operating correctly. Replace your faulty check valves with quality upgrades from Allstar.