Toyota Yaris GR and Corolla GR Dump Valve S4 allowing the heat to transfer

allowing the heat to transfer as it passes

and limit differential movement under load without sacrificing ride quality or introducing any perceivable additional noise

Over time the OEM valve begins to leak

fits only: Opel Corsa E OPC / VXR (2015-19)

and are tucked high in the exhaust tunnel

Toyota Yaris GR and Corolla GR Dump Valve S4 allowing the heat to transferThis Blow Off, or Dump valve, has been developed for the Toyota Yaris GR Turbo engine that has the electronically controlled bypass valve (OE Part no. 7. 04654. 08). It is recommended for any vehicle where the boost pressure has been increased by an ECU software upgrade and for unmodified vehicles operating in warmer climates, as a solution to the many failures that have occurred. Unfortunately, the failure doesnt always result in a check engine light