Not all cars respond equally to chiptuning. Some engines have enormous potential for power gains through simple ECU remapping. Here are the top 5 cars that deliver the best results:

1. BMW 330d G20 (B57) - From 265 HP to 320+ HP with Stage 1. The B57 engine responds excellently to remapping.

2. VW Golf 7 GTI (EA888) - From 230 HP to 300+ HP. One of the most popular engines for chiptuning.

3. Mercedes C220d W205 (OM654) - From 194 HP to 240+ HP. Impressive torque gains.

4. Audi A4 B9 2.0 TDI (EA288) - From 190 HP to 230+ HP. Efficiency meets performance.

5. Ford Focus ST (EcoBoost 2.3) - From 280 HP to 330+ HP. High-potential turbo engine.