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Old 04-03-2009, 12:56 PM   #76
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Join Date: Apr 2009
11 STI


Nice to seem some up-close comparison pics.
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Old 04-03-2009, 09:07 PM   #77
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Join Date: Oct 2003
Location: Tucson, AZ

Originally Posted by tekfoc View Post

From the wiki "Pistons are the same as previous years also came with the new valves and cylinder heads."

What changes exactly were made to the cylinder head? That's what I can't seem to find anywhere. Thanks for the link though!
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Old 04-03-2009, 11:03 PM   #78
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Join Date: Jul 2002
Chapter/Region: Tri-State
2016 C63S AMG MB
Iridium /MB C300 4MATIC


Head casting for better cooling that eliminate the need for sodium filled exhaust valves .
Much less restrictive tumbler valves , different turbo management system.
Well seems with these heads your able to push alot air and torq with a protune .
Having top feed injectors is great cause it opens the door to alot of top quility injectors that's in the market.
But for me I find the drive train to the biggest plus, torson diff , much longer gears.
There is so much stuff that is different that it's hard to remember it all.
What sucks is the factory tune very unsafe for the type of performance these cars are built for ,but with a good tuner the 07's are torq monsters .
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Old 04-04-2009, 10:38 AM   #79
02 wrx sleeper
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Join Date: Jul 2004
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2006 WRX Limited


2007 STI changes compared to the 2006 STI:

In 2007, quite a number of changes were made to the US-spec model. Due to Subaru's decision to reduce costs by cutting the amount of aluminum used, the US-spec STI no longer receives the J-spec Spec C control arms. The control arms are now the aluminum ones used on the Japan-spec revision A and B non-Spec C STis. The high caster angle has been reduced, which in turn reduces the wheelbase from 100" to 99.4". The rear sway bar has decreased in size from 20 mm (0.8 in) to 19 mm (0.7 in). The gear ratios of second, third and fourth gears have been made longer (higher ratio) in order to improve fuel economy and driveability, which inadvertently reduces 1/4 mile drag racing times due to the ability to trap 114 mph (183 km/h) in 4th gear, without the shift to 5th. The EJ257's cylinder heads have been redesigned to improve cooling, and the sodium-filled exhaust valves have been deleted. Pistons are the same as previous years also came with the new valves and cylinder heads. The alternator is changed from a 90A rating to 110 amps. The rear Limited Slip Differential is now a Torsen unit, considered an upgrade over the previous model's helical unit. The turbo has also been changed to the VF43, which has a different wastegate actuator than the VF39. The side cowl braces are stiffer than the 2006MY. The engine mounts are once again the hard rubber mounts used prior to 2006. On the interior, there is an audio jack that replaces the ashtray, a rear center armrest with trunk pass-through and a 120 W audio system.[5]

The ECU was completely re-engineered in order to meet US LEV2 emissions requirements, which has caused throttle and timing issues. A secondary air pump was also added to help meet LEV2. Top Feed injectors replaced the Side Feed from the previous models.

The WRX STI Limited is introduced. It is similar to the Japan-spec STI A-line, except the mechanicals of the car are based on the 2007MY US-spec WRX STI.
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Old 04-04-2009, 06:17 PM   #80
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2015 WRX-Mine
2007 F-STI-Her's


48 comparo?
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Old 12-02-2015, 02:57 AM   #81
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Chapter/Region: International
Location: West Australia
2000 WRX
Red Mica


Bumping an old thread.... Was a VF48 comparison done?
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