Do they make a notable difference? Both are NLA and seem to be impossible to find
So the vehicle is a very early spec, 2005 e90 330i 6MT, parts we fitted by BMW but unfortunately no before or after Dyno results at that point.. what I remember is the car sounded amazing (especially with the back box changed out).
Subsequently, car was decatted & UniQ fitted:
As found power 180kw & car gained about 12kw after tuning.
She felt a bit faster post tuning, almost lighter and like she went on diet..Much more nimble if you will.