Quote:
Originally Posted by chiefshayan
IIRC, a lot of cars are unequal length. The rumble is present because of how Subaru puts the engine together. The UEL header promotes the boxer rumble. Even an EL header on an STI will still have the boxer rumble.
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The reason the Subaru exhausts have such a pronounced burble is because of how unequal the runner lengths are. Most stock manifolds are slightly unequal, but Subaru boxers are VERY unequal.
It will?
[ame="https://www.youtube.com/watch?v=zkJ9MaEdWcY"]2012 STi sedan with EL headers and Greddy Evo 3 exhaust - YouTube[/ame]
[ame="https://www.youtube.com/watch?v=0CwgnWmtwgI"]2011 sti stock exhaust manifold vs perrin equal length manifold - YouTube[/ame]
[ame="https://www.youtube.com/watch?v=sGdcre_3Mx4"]2012 Subaru Wrx Un Equal and Equal Length Headers before and after - YouTube[/ame]