There are many things you can do to transform the Peugeot 206 into a more powerful car. Some intake modifications and suspension mods are really all that is required.
Database of Dyno results
OBD2 OBDII performance chip tuning module excellent performance for Peugeot 206 2003+ - AliExpress
Peugeot 206 SW - ECU Remapping, TCU Tuning, Chip Tuning, DSG Tuning
Chip tuning box Peugeot 206 2.0 HDi 90 hp 205 Nm - Bosch
Peugeot 206 - Dublin - ECU Remapping and Programming, DPF Solution, Chip Tuning
Tuning box for Peugeot 206 cc
Chip Tuning OBD2 do Peugeot 206 + 1.1 1.4 ,1.4 HDI Proracing prog 359 za 549,97 zł z Legnica - - (13564847453)
Peugeot Performance Fuel Saver Intake Kit
Advice : r/peugeot
TDI Tuning - Peugeot 206 CRTD4 TWIN Channel Diesel Tuning Box Chip
Map tuning Peugeot 206 - CKECU