Why choose us?

Protocols' CR-Pro tuning boxes are both a safe and easy way to tune your engine without any risk to the integrity of the engine. With plug and play installation, our units can be removed at anytime without leaving a trace therefore keeping your warranty intact.

We provide tuning boxes for a huge range of diesel engined cars, with a guarantee of safety, performance and satisfaction.

Our boxes provide multiple safety features including voltage protection, polarity control, spike protection, and signal calibration on every engine start-up.

We only use high quality printed circuit boards with surface mounted technology using a 200MHZ 64bit microprocessor.

In the first minute of operation, the special algorithm software automatically learns the values of the car to provide the best possible mapping, this is turn provides your vehicle with the best possible performance.

  • 3 year warranty
  • 100% plug & play
  • Increased power & torque
  • Increased MPG
  • Reliable & safe
  • Industry experience
  • No changes to vehicles ECU
  • Automatic gearbox compatible
  • Easily installed at home
  • Untraceable when removed
  • Manufacturer spec wiring harnesses 
  • DPF compatible
  • Only high quality digital electronics used
  • Free tracked and insured postage on all UK orders