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Old 08-19-2013, 10:48 PM   #16
Luis_GT
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Join Date: Jul 2012
Drives: 2002 BMW 530i, 10 Series FR-S
Location: Puerto Rico
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Quote:
Originally Posted by mav1178 View Post
BMW may have added improvements in the intake manifold, runners, secondary valves in runners, or ECU tune to remove the need for an intake resonator.

There's many reasons beyond what you can see on the outside.

-alex
Same Engine, Same HP and TQ numbers, built at the same time... only difference... one marketed as an upclass sports saloon (quiet) the other is a sports coupe, sedan or vert.
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