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Old 11-12-2005, 07:05 PM   #1
DTECH-WRX
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Join Date: May 2003
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Default '06 STi Equal Length Headers

(posted in wrong forum by original poster....should be moved)

http://forums.nasioc.com/forums/showthread.php?t=878685

http://www.autoweek.com/article.cms?articleId=103062

"The STI’s four-cylinder still offers 300 hp and 300 lb-ft of torque, but gets a new tuned exhaust (as does the WRX) with all four equal-length pipes expelling gas out of the combustion chambers. The system improves low- and mid-range torque—not to mention the throaty sound the exhaust emits."

Unless Autoweek does not know what they are talking about, looks like Subaru might be setting up for a twin scroll turbo upgrade for the 2007 STi since equal length is more ideal for twin scroll setups (for spool up / simultaneous exhasut gas pulses on the turbine wheel through the twin scroll turbine housing manifold.

Hmmmm....interesting.
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Last edited by DTECH-WRX; 11-12-2005 at 08:11 PM.
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Old 11-12-2005, 08:12 PM   #2
DTECH-WRX
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I'm wondering if anyone has noted a different exhaust note on the '06 STi vs the '04 / '05.
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Old 11-13-2005, 12:11 AM   #3
Evil STI
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That article has a misprint, as it should have stated that only the normally aspirated 2.5L Subaru gets the equal length header. My 2006 STI sounds exactly the same as my 2004 did.
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