Quote:
Originally Posted by WolfpackS2k
Does this exhaust piece make the engine note unbearably loud? Are there any dyno gains to be had from this modification?
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There is quite a lot of drone inside the car with this piece. It was a bit too loud for me, so I had a resonator welded in the pipe between the two tips. Definitely cut down on the drone, especially in the city driving rev range (around 1,000 to 3000 rpm). Without the resonator, a lot of the drone is in that range...with the resonator it quiets it down overall and moves up a bit in the rev range.
Not sure how to explain that better, but basically without the resonator it would drone heavily during acceleration, deceleration, and in the rev range where you are normally driving at city speeds (35-45mph). With the resonator, the acceleration and deceleration drone have quieted down a bit, there is virtually no drone at city speeds, but now there is drone at freeway speed (80mph). Since I do most of my driving around the city, I feel like this is a great trade-off.
Here is a video I made right after I installed it (rest of the exhaust is 100% stock):
[ame="http://www.youtube.com/watch?v=NVcRM-w0h4c"]Berk Dual-Tip Muffler Delete (2013 FR-S) Before and After - YouTube[/ame]
Note: The video was taken with the car in the garage, so there is a little reverb in the sound. It gives a good comparison, though.
Picture of the resonator welded in place:
To answer your final question, I don't believe there are any performance gains as far as power...there is a bit of weight savings, though. The Berk piece is much lighter than the stock muffler piece