The OEM tumble generator valves (TGV) found on the Subaru EJ engines create an air flow restriction when it comes to time for performance upgrades. Their primary purpose is to reduce emissions from cold idle to meet standards governed by EU emissions regulations. The Aeroflow TGV Delete's do not contain any butterfly valves, sensors or motors. Allowing a direct flow of air into the cylinder heads with no restriction. It will be required to adjust the ECU mapping to take full advantage of this mo
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The OEM tumble generator valves (TGV) found on the Subaru EJ engines create an air flow restriction when it comes to time for performance upgrades. Their primary purpose is to reduce emissions from cold idle to meet standards governed by EU emissions regulations. The Aeroflow TGV Delete's do not contain any butterfly valves, sensors or motors. Allowing a direct flow of air into the cylinder heads with no restriction. It will be required to adjust the ECU mapping to take full advantage of this mo
10.2K views11 months ago
FacebookAeroflow Performance
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