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chiefshayan · 05-30-2014, 05:46 PM

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.

05-30-2014, 05:46 PM	#8
chiefshayan Senior Member Join Date: Mar 2013 Drives: 2013 AT Firestorm FRS Location: Berkeley Posts: 433 Thanks: 185 Thanked 184 Times in 88 Posts Mentioned: 7 Post(s)	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.