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These plastic check valves are used in a number of applications and are prone to cracking over the years due to varying engine temperatures. This can weaken or cause breaks in the valves causing a vacuum system leak, leaving you with a rough running engine and a check engine light.
Replace your vacuum system check valves to restore engine performance. It's now easier than ever to seal up all of those vacuum leaks and get your engine running properly with ECS Tuning.
