Modification in the exhaust system is permitted without any further test of tailpipe emissions and CO2/fuel consumption provided that the emission control devices, including particulate filters (if any), are not affected.
Is ceadmhach an sceithchóras a mhodhnú gan tuilleadh tástála ar na hastaíochtaí sceithphíopa ná ar an ídiú CO2/breosla, ar choinníoll nach ndéantar difear do na feistí rialaithe astaíochtaí, lena n-áirítear na scagairí cáithníní (más ann dóibh).