Thread: OBX Headers
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Old 03-25-2011, 02:45 PM   #7
insite
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Join Date: Sep 2004
Location: Atlanta
Posts: 1,820
Let us know how it goes. Btw, one eBay seller returned an answer. The OBX are 1-5/8 primary and 2-1/2 secondary, which is spot on for the 3.2 & 3.4, but a bit large for the 2.5 & 2.7.

Sounds the same as the m2. I have to measure mine; I think they are 2". My car is WAY rev happy. Not much down low, but feels like it could pull way past redline. Need to dyno it sometime.
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insite
'99 Boxster
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