Quote:
Originally Posted by KiingDavid
... water gargling noise...
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The "water gargling noise" or "boxer rumble," whether you're a hater or a fan, really is only because of the headers. OEM turbo subaru engines use
unequal length exhaust manifold (headers), which has lengths such that two of the four exhaust pulses per engine cycle leave the manifold at the same time. Thus, you get a big 'burp' if you will, followed by an absence of exhaust pressure and sound.
A boxer can also have equal length headers fitted, making it sound more like a porsche or
.