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While surfing their site I just noticed this company Grimmspeed is now offering ported and polished exhaust manifolds for the Subaru 3.0 H6. I have their P&P manifolds on my STI and they were very nice pieces. Perfectly matched to the size of the gasket for the best flow. Obviously you can't port the entire manifold, only the actual ports are ported (that sounds funny lol). On my car the ported manifold helped my turbo spool a bit quicker. Sadly the Tribeca doesn't have a turbo, but I would expect throttle response to be increased. They are claiming up to 15whp on the 3.0.

So the question is, who has an extra $279.99 laying around and the available downtime while they perform the work?

http://www.grimmspeed.com/catalog/product_info.php?cPath=60_77_67&products_id=134
 

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DubyaSTI..... Keep this thread going, I am looking for a complete exhaust system for my 06' and haven't found anything yet!
 

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