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Custom Backbox?

528 views 0 replies 1 participant last post by  Steven_FJX 
#1 ·
I was thinking about removing the stock backbox and just replacing it with some pipe and a tip as it would make it sound less tame. Can anyone tell me the diameter of the end of the center section (where the backbox connects). I seem to see different answers everywhere.

I have an 06 9-3 2.0 Aero
 
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