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2009 Outback 3.0R
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194 Posts
Discussion Starter #1
Hi guys,

does anyone knows the diameter of the exhaust ports on 3.0 engine?
I got some headers and curious if they match the opening without having to remove mine.

Thanks
 

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2005 Outback VDC limited 3.0r
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319 Posts
Hi guys,

does anyone knows the diameter of the exhaust ports on 3.0 engine?
I got some headers and curious if they match the opening without having to remove mine.

Thanks
Are they specific to the ez30d? The earlier ez30 had a single port and obx made headers for them, the wont work with the later 3 port ones in our ez30d.
 

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Premium Member
2007 3.0R Outback 5EAT SI-Drive, Push Start JDM 130k km
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250 Posts
Hi guys,

does anyone knows the diameter of the exhaust ports on 3.0 engine?
I got some headers and curious if they match the opening without having to remove mine.

Thanks
I have an OEM EZ30 3 port exhaust gasket on the bench for a 2007 3.0R. The internal diameter of the 3 large holes on the gasket is approximately 44 mm. Hope this helps.
 

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2009 Outback 3.0R
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194 Posts
Discussion Starter #4
the gasket is approximately 44 mm
44mm diameter holes seem to me very large more like an intake size. Can you confirm that it is for a 3.0 not for a 3.6? Thanks!

From what I got it looks like I still have to compare to the actual ports size as gaskets vary in size and usually are larger than the port opening.
I need to fix the steering boots so good opportunity to check.
 

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2009 Outback 3.0R
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194 Posts
Discussion Starter #5
I can confirm that the OEM exhaust gasket ports are almost 44mm. I'll find out next week how large the actual ports are.
 
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