GFB 19+ Hyundai Veloster 1.6 GDI Turbo / 16+ i30 SR 1.6T-GDI TMS Respons Direct Fit Blow Off ValveIf cars like yours typically suffer issues such as backfiring and stalling when using a fixed ratio atmosphere venting BOV, the Respons can help. By adjusting the venting bias to suit the car you can achieve a blow off sound without having to put up with the issues. Like all GFB valves, the Respons utilises GFB? s proven TMS Technology to ensure rapid boost recovery on gearshift and optimum throttle response, as well as the ability to withstand boost