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Spec S S15 (Non turbo) catback exhaust whoosh sound, normal?

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Hey guys,

A couple of months back I had an aftermarket Tomei Expreme Ti exhaust fitted on my Spec S s15.

Since installation, when accelerating hard and changing through gears quickly, the exhaust creates a whooshing noise, similar to that of a turbo car.

Must admit, its a preety cool sound, but I just wanted to know whether this is normal for a larger aftermarket exhaust system?

I believe it may be to do with more air travelling through or back pressure, but Im just guessing here, so any advice would be awesome ;)

The power remains the same, so car in general seems to be fine.

Hopefully its not a leak, seeing as its a new system :(



Regards

Ash
 
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