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2015 RB Accent-not so stock 🀫
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It makes no sense to make them 2.5" at the turbo(yet some do) as it restricts the turbo more than 3". They're made 2.5" at the catback to mate to the oem and most aftermarket catbacks which are also 2.5". The only reason why full 3" DP were made was because solo came out with the first 3" catback for the VT then a couple others followed suit.

Ideally you do like I do and port the turbo outlet to match the full 3" DP ID with no restrictions thereafter.....
This is why I'll be sending you my stuffed turbo to you for a little massaging of the passages.
Holiday discounts ftw. πŸ˜‚πŸ˜œ
Thanks for the explanation @trdtoy . πŸ™πŸ½πŸ‘
 
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