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Old 05-10-2010, 05:43 PM   #1
Scooby Newbie
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Join Date: Aug 2006
Location: Denver, CO
Default Perplexing IM question? ) 06 vs. 07

So I have an 06 wrx manifold in my hands, and what I BELIEVE to be a 07 wrx intake manifold/or maybe a FXT's.

I know the 06 is what it is, no problem. But this other one has a flat cast where a nipple usually is on the side of one of the runners on the side of the whole manifold. On the 06 there is a nipple here.

I have also heard that 07 wrx IM have no nipple on the back side behind the throttle body.

Also this mystery Intake manifold has 2 freeze plugs in the back of it like an sti casting. It actually looks very very similar to the sti cast, but alas from the factory it is un-coated.

What is my mystery manifold?? And for that matter what is the difference between the 06 and 07 wrx manifolds?

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Old 05-10-2010, 08:53 PM   #2
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The 2.5 WRX and the STi castings should be identical minus the red paint...
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Old 05-11-2010, 01:29 PM   #3
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Location: Charleston SC
2012 Legacy 3.6R LM


Originally Posted by kpluiten View Post
The 2.5 WRX and the STi castings should be identical minus the red paint...
So why does my 2.5 WRX have the red paint on the intake manifold. 07 WRX TR, Hruuuuh?
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