Quote:
Originally Posted by N_Raged
They're quite different IMO. The STi is a flow-through resonator that goes into into a small chambered silencer - all packaged neatly into the dimensions of the stock muffler. While the Authorise S is just a big chambered silencer.
From the various sound clips I've seen. The STi has more bass and growl, while the Authorise S is more plain in its tone.
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Some more thoughts on how those two compare.
The Authorize S sounds like the stock muffler uncorked - a little bit louder and clearer tone but still very much the same plain character of the stock exhaust.
The STi muffler has a more distinct character to it. More refined, very deep tone, not raspy or tinny.