Quote:
Originally Posted by bmw_fanatic
Check out the engine section on F10 5 series board..someone just posted review on it.
Expensive yes! But it's probably the only choice for now!
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This one? OP says below 3000rpm it just feels the same as stock. <3000rpm is exactly where I'm at when I'm driving normally....
http://f10.5post.com/forums/showthread.php?t=700487
Cheers
Robin