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Old 11-12-2005, 07:44 PM   #22
Scooby Newbie
Member#: 37042
Join Date: May 2003
Chapter/Region: South East
Location: South Florida
2014 Forester 2.0 XT
Marine Blue Pearl


"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 exhaust gas pulses on the turbine wheel through the twin scroll turbine housing manifold.

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Last edited by DTECH-WRX; 11-12-2005 at 10:35 PM.
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