As you can see below the Wheel Horsepower of a 2.2l (L61) G5 is 144.21 WHP and 143.45 Torque after these mods: Injen Ram Air Intake (now Cold Air Intake) OBX Headers welded to a High Flow Cat welded to a 2.5" Exhaust welded to a Custom Sport Muffler I also waited to use the Trifecta tuner so...