It's cheaper to trade for a C43 than it is to get any measureable power out of that car. Bolt ons do nothing, dialing up the boost turns that eaton blower into a giant grenading heat pump and the driveline does not stand a chance even if there was more power to be had. Good C43's have come down significantly and are a blast to drive. You will spend the difference getting your 4 cyl to that power level and you still won't have the suspension, brakes, trans, diff, body kit, wheels, factory xenons, two tone interior (I take that back, a few 230's had that option) or revised engine/trans software that are all designed to work as a cohesive package. Really, the smart money is on the car that's already done and already a proven performer.