Is it worth it to do a remapping on normally aspirated engines (these engines neither use turbo nor supercharger technology)?

The performance gains will obviously be more limited but we will still achieve increases anywhere from 5 to 10%. This can be done by mainly adapting engine timing parameters. We can also remove/optimize some other parameters or OEM limitations that do not make much sense (like for the 2006 RS4 V8 on first three gears by changing torque limitations), or remove speed limitations or gas pedal sensibility which will even have more impact on automatic gear boxes (sportier driving). In some cases you could also observe increased mileage figures.