A little bit louder at idle...like a real little bit that the owner would only notice.

Still low rumbling boxer goodness.


The DP is the one that changes the sound more drastically because you can really hear the turbo spool.

 

it doesnt change it enough to notice, but you should feel a bit of power gains.

 

hardly any noise difference...just faster spool up. i agree that the DP makes more of a difference.

 

Just did mine on my Forester:

http://www.scoobymods.com/forums/showthread.php?t=5157

I didn't notice any difference in sound that I can tell.

 

Mine was the same sound level.. it just was a wee bit harsher sound.. barely noticeable and could be my mind playing tricks on me.. again..