yep, thats a 4 cylinder...sounds great. my dad's 2005 mitsubishi lancer ralliart sounds similar when the pedal is to the floor (also a 4 cylinder). the only modification to the car was that we replaced the stock air intake with a cold air intake system from AEM. whatever mods were done to that 320 created a nice sound. the video description and comments lead me to believe only the exhaust was modified, other than that, who knows?