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      08-29-2012, 10:35 AM   #47
NJ 1161
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Drives: 335D M3
Join Date: Nov 2011
Location: UK

Posts: 1,082
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Originally Posted by xs2man
I wouldn't worry about making power with a filter, its just unlikely to happen. Have a look at these 2 videos:

Ok. Its almost 20 mins of your time, but you will realise that its ALL for the noise, and maybe a small reduction in power.
I'm only really doing for the noise, and the rumble/ burble which is unbelievable compared to stock.

However, would rather not be losing power!
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