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Apr tuned w/ unitronic intake

snobrdrdan

former GTI owner
Im pretty sure its the fact of the "Stage 2" pipe being metal. Its the way the air harmonics works against the metal. That was the impression i was under.

Not true actually

I had the noise with just the "Stage 1" portion of the (MK6 GTI) Unitronic intake on my 1.8T Passat
 
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