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      02-19-2013, 12:36 PM   #10
kitw
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Drives: 2015 MW M3/2014 Boxster S
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Quote:
Originally Posted by dead ringer View Post
its all across the board, but only under hard throttle. Normal driving it doesn't sound different. I will drop by the shop that installed test pipes on Monday & have them check. @ idle in the garage I can't locate any strange sounds.
That is normal behavior when you go for a higher flowing air filter. My AA filter made some additional induction noise.

It's much more pronounced on the charcoal filter 08/09 cars too.

The exhaust leak is still a possibility making the noise, but it's a quick fix to swap in the air filter, so I would try that too.
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