Quote:
Originally Posted by Leozap
So it's better off just to buy the MS air filter alone huh...
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Yep I'd suggest so. I think the plain and simple evidence is that the stock intake system is more than adequate for even a highly modified M3 once the restrictive stock filter is removed.
Just like you never go any bigger on an exhaust once you have reached the appropriate size for your application, I'd suggest the same logic should basically apply on the intake. Remember smaller intake pipes mean faster air speeds so it is all about achieving optimal flow capacity AND air speed...