Originally Posted by hp jnkey
I can't wait to see the difference between the 2 dyno's.
I just ordered a Cobb AP for my 2008 535i. I'm taking it in on this Wed. to get the fuel pump replaced and the injectors checked but the SA said they will be reflashing the ecu after all this work is done. I've heard from BMW owners that have had the reflash done, that the car's feel slower than before. I'm still not sure if I want to have this done. The fuel pump was just replaced in January but I don't think they reflashed the computer.
I thought about the Dinan but it's a total pain to have it reflashed every time it needs service ot warranty. That's what made me decide on the Cobb.
With a tuned car those software updates that may or may not make your car "feel" slower wont really matter. Just plug the cobb in and enjoy the ride!