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When installing certain AWE Tuning exhaust systems, the stock exhaust valves are eliminated. This can trigger a code in your ECU that may not cause any performance-related problems but can tend to cause a check engine light to appear.
The AWE Tuning Exhaust Valve Simulators plug right into the factory harness in place of the exhaust valves and will prevent any such code from being stored in the ECU due to the removal of the stock valves.
Please Note: Sold as a set of two.