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Hi guys I recently had a stage 2 with a new GTC Street Ti exhaust and the transformation has been great compared to stock. One thing I've noticed is a whistle/blow noise when accelerating hard above 3K RPM which gets louder with more power you give. I am not 100% sure if it's normal and whether it's coming from the exhaust or engine area.

Interested hearing from anyone with a similar set up? Could it just be a turbo boost noise? There is no loss of power noticed and it only happens when accelerating. Visual check under the car and engine bay showed nothing obvious.
 

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Can you give us a sound recording sample
 
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