|
The options you have listed are way too expensive. If I were not to opt for the OEM BMW Performance Power Kit, I would get the JB3. Its cheap (450EUR), has multiple "maps" (power levels) selectable by accelerator pedal pressing, offers the most power gains (60-80whp is typical) of all tunes and you can install/remove it at home. Also, it is one of the most popular (if not the most popular) tunes for the 135i/335i.
|