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Originally Posted by mlai
Neversummer78 and Andreo,
My 650i GC also felt a tad more responsive with the mod. My friend who test drove the car last night also mentioned the same and asked what I did (I didn't tell him the mod).
Did you guys feel your 650i a bit more eager to go and more responsive after the mod? Or am I and my friend just hallucinating........
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I did not pay too much attention to the responsiveness but I did notice that the engine drops below 1000 rpm a couple seconds quicker at cold start than before. So I won't be surprised if it did improve responsiveness but it's a little difficult to tell for me as the vehicle is still relatively new. I need to get to know her better first.
Overall, the exhaust note is more sonorous but the difference is not as significant compared to the same mod on the E92 335i I used to own.