Most newer production engine at nowadays already equipped with Variable Valve Timing and valve Lift using electronic Control.Like VTEC for Honda,Mivec for Mitsubishi,vvtl-i for Toyota,and CPS for Proton the national car maker.By using Variable Valve Timing and valve Lift technology,the internal combustion engine does not need use forced-induction system like turbocharge system to produce same horsepower when forced-induction system are used.The Principal of this Variable Valve Timing and Valve Lift system are using two camshaft profiles and electronically selects between the profiles.One profiles of low revolution per minute(rpm) but better fuel efficiency and another profiles for higher rpm to achieve more horsepower.When at high rpm the onboard computer will automatically change it cam profile to higher cam profile make the valve lift more so more air will get in the combustion chamber.By that more horsepower will produce.