In this study. it was aim ed to decrease the vibration reaching to passenger from the legs of vehicle seats. In order to determine the levels of vibrations reaching at passengers. a test pad placed under the passenger seat was used. https://www.roneverhart.com/MagnaFlow-2001-2004-Kia-Spectra-California-Grade-CARB-Compliant-Direct-Fit-Catalytic-Converter/