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      10-24-2021, 04:45 PM   #15
blacksapphire440i
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Drives: 2018 440i Gran Coupe
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Quote:
Originally Posted by Skyhigh View Post
5-10 WHP are in reality within the tolerance and repeatability of a dyno/engine.

Unless this is the averaged result of e.g. 10 measurements pre-mod and post-mod under the same environmental conditions.

I wouldn't bother still, given the potentially increased wear. But that's just me.
I feel the same way too. But a closed box intake system is as close as you're gonna get between the sound, power, and reliability!
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