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Discussion Starter · #1 ·
Just looking for the outside diameter of the tubing on a hks or greddy header.
Im guessing on a 1.6mm wall thickness , so really just need the O/D , but if someone knows both that would be great.
I have two sizes available to me , 38mm and 44mm 0/D , just interested in what they use.

thanks in advance :)
 
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