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      08-28-2012, 08:35 AM   #46
PMKC
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Drives: E36 M3, Supra Turbo 6sp
Join Date: Apr 2010
Location: Shawnee, KS

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Quote:
Originally Posted by ///M1 View Post
Their E39 M5 application was greatly flawed as it was an open-air design and actually sucked hot air in. On the RS 4, caused CELs which no tuner could fix. On either car, their performance gains were never substantiated independently.
just to point out, one of those cars was indeed tested at an independent shop:
http://www.europeancarweb.com/tech/p...and_n_drop_in/
here's vid with no cel:

outboard sound:


I doubt the M5 will sound like this since it is turbo but would be nice,