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K&N intakes don't require a piggy back ECU mod to run. It's a single stage intake. SRT puts that piggyback to fool the computer it's getting the correct amount of air through the MAF.

I prefer the stock airbox over any open element filter intake system for many reasons...

1) You retain the low end torque and back pressure the factory intake box was designed for.
2) The secondary chamber opens up after 3,600 RPM to produce that robust sound...not all the time like with a single stage open element.
3) Your factory air intake is designed and engineered to draw in cool air from the front, not suck in hot air from the engine bay.

My $0.02.
 

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Haha u think the intake made u beat the M5 in the lowend?? Both cars specs the
ISF stock has a quicker 0-60 time then the stock 2006+ M5 so realistically u didn't win because of the intake.
Agreed. I had a run in with a new M5 a few weeks ago and I was able to hang with it with no problem. Stock intake and all.
 
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