My mate has a honda civic coupe and he didnt know it was vtec until i pointed out the vtec solenoid in his engine and confirmed his engine number as d16y8 and his ej8 stamp... i redlined his car and didnt hear any vtec switchover..his car has an exhaust and i took off his cover on his filter just to be sure...cuz its sohc can you hear anything or is just not noticeable....lol my mate thought he had a gli coupe the whole time..is their something wrong with his car??