ok guys this is the thread to put all your technical term questions eg.. VVT-i and VVTL-i What is VVTL-i ? In addition to VVT-i, VVTL-i also incorporates a changeover mechanism that varies both the amount of lift and the duration of valve opening of both the intake and exhaust valves. The VVTL-i mechanism uses two different sets of cams on both the inlet and exhaust camshafts to provide different settings for low/medium engine speeds and high engine speeds. This makes it possible to produce very high engine output (power) without sacrificing fuel economy or torque at lower engine speeds. (Note how flat the torque curve is.) How does VVTL-i work? The Toyota 2ZZ-GE features different sets of cam lobes on both the inlet and exhaust camshafts for low/medium and high engine speeds. When the engine speed exceeds 6000r/min and the engine water temperature exceeds 60 degrees Centigrade, the ECU activates an oil control valve that pressurises oil passages in the inlet and exhaust camshafts. This activates a cam changeover mechanism on each set of cam lobes which ‘locks’ the cam rollers onto the high-speed cam profiles. The result is that the lift of the intake and exhaust valves is extended, enhancing the engine's 'breathing' and power. Video ABS - Anti-Lock Braking System: A system connected to the braking mechanism in the vehicle, designed to prevent the car from skidding. as the list grows myself and the other mods will update this first post. 1zz-fe - The one refers to it being the 1st generation of the ZZ series engines, fe is Toyota speak for economy tune. 2zz-ge - The 2 refers to it being the 2nd generation of the ZZ series engines, ge is Toyota speak for performance tune. FE = Economy GE = Performance GZE = Performance Supercharged GTE = Performance Turbo Charged. ZZE121, ZZE122, ZZE123 denote what model it is, ZZE122 is the hatch in 1zz-fe engine form, ZZE123 is the hatch in 2zz-fe form. FTW - For The Win