Some benefits of the Px3 Chip are:
Fully Tunable for Power or Efficiency. Just Twist the Knob.
Add 25-50 Horsepower and 35+ ft/lbs of Torque!
Or Increase Fuel Mileage by 25% or more! And Reduce Emissions!
Works on all Fuel Injected models (except turbo)
100% Reversible, Will Not Void You Warranty!
Safe, will not hurt your vehicle or electronics!
Increased Top Speed ability! (does not remove top speed limiter/governor)
Easy install, can be done in less than 5 minutes
I guess theres a non turbo 335i