Quote:
Originally Posted by nikitopo
Hey! Long time no see. Personally I would go with the STI performance muffler, because STI knows the car better and adds to the OEM look and feel. Fujitsubo is a nice brand , but they are building exhausts for almost every car manufacturer. Japanese cars, German cars. I heard in the past that the STI muffler is also build by Fujitsubo, but I am not really sure because there are some STI videos showing their own manufacturing process. If the information holds and Fujitsubo is the real manufacturer, then I believe that the requirements and specifications were provided by STI.
About sound levels the STI performance muffler in the BRZ is not very loud. There is a really LOUD growling when you first start the engine from cold, but after the noise goes down to almost factory levels. I was seeing the same behaviour with factory performance exhausts (Porsche) when I was living in Germany. You could hear the exhaust in the whole square, but just for a fraction of the second when the engine was started. A louder noise appears also when you engage 1st gear in town in start and stop traffic or during hard acceleration from 2k to 3k RPM. In these cases you'll be definitely noticed by other drivers, but as I said it is for a small fraction of time and then it goes almost to factory levels! The loud noise is not only about the noise level, but also about the sound frequency with a nice deep bass sound. After 3k RPM the bass sound disappears and changes to a more race frequency, but again only during hard acceleration. Otherwise you might think that it is a factory exhaust. On the highway and above 3k RPM it is a bit louder, but the difference from factory levels is again small and it is not really unpleasant. After all you want to hear something, right?
On the performance side there is no change at all. I measured some acceleration times (20-60 mph in 2nd gear) and the before and after times were exactly the same! The only difference I can see is a bit better launch which helps a lot with my lightweight flywheel. If I measured a 0-60 mph time, then I believe I would see some very small improvement ...
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Yeah I also heard that Fujitsubo is the one behind the STI branded exhausts/mufflers. Actually looking at the welds and comparing to Fujitsubo they are exactly the same so most likely it is Fujitsubo.
Thank you for the awesome write up! I do agree with you, and I will go ahead with the STI Muffler, once I sell some extra wheels I have and use that money on that muffler since it's very expensive haha.
I'm not worried about any performance gains. I just want to replace the stock muffler since it's rusting already and looks super cheap.