Last used on a 2005 VW Golf 1.9 TDI PD 105 BHP. No longer have the car so unable to test, hence selling for spares. I can remember that the LED indicator on the unit did not light up (fused bulb), but worked perfectly otherwise. Has been in loft storage for a few years since.

Upto 40% more BHP and torque
Upto 20% improved fuel economy
Easy to plug into the existing injector loom
Adjustable mapping modes to increase/decrease tuning

Complete with full instructions guide

Possible to program to other cars and engines from the list shown in second pic.