I bought one of these:
the Resistor inside makes the car suck in more cold air and add more fuel= more power got mine off ebay for 26quid. good thing is it just clicks straight in, bad point is you use allot of fuel. my car
1.9 TDI PD 96KW 130bhp increases to 155bhp + 40Nm of Torque
try here on ebay: l-i-n-k Boring bit how it works:
The t-box is merged directly into the sensor technology of the engine. The controller of the respective vehicle gets now sent by the t-box data and adapts the mixture. The t-box changes the sensor signals so that the injection amount and the injection pressure is again computed. By the again computed amount of filling and in connection with the increased injection pressure a clear increase of the torque (Nm) is obtained. The mixture is co-ordinated further directly on the controller of the vehicle and adapted optimally. The load pressure of the turbocharger is raised not directly by the t-box but determined and controlled further over the controller. Since no maximum load limiters by the t-box to be waived are reduced damage and increased wear to a minimum. All diagnostic functions do not remain and it error messages in the diagnostics memory are put down.