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Discussion Starter #1 (Edited)
I was wondering if anyone knows why my P10 makes almost a turboesque sound after about 4000rpm in any gear. However, the car is completely stock. I had a short ram intake on my 1990 Integra before i wrote it off, that sound is definately not the intake.
 

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I can only think of two things. More are possible.

1. Possible air vacuum leak somewhere. Check hoses/connections.
2. If you have a hi-flo intake, like the JWT/Stillen, some experience a high pitched whine at high rpm's just like you explained.

I had the Stillen/K&N on my old '91 NX2000 and experienced the sound, but ever sine I put it on my G20, I have not heard it once.

Can't explain where it comes from though???
 

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Do you have a POP Charger or open air filter? I get a 'sucking' sound near the top of my rpm range too. Depends on where it's coming from?
 
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