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Milltek I/D

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Old 01-30-2017 | 10:49 AM
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Default Milltek I/D
Hi all

Can anyone tell me what the internal diameter of the milltek twin is, please? I'm trying to pair up a decat with it and can't decide on the 70 or the 63mm decat.

Thanks
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Old 01-30-2017 | 12:37 PM
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Its a 2.75", so 70mm.
https://www.s2ki.com/forums/s2000-mo...haust-1072695/
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Old 01-30-2017 | 01:36 PM
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Thanks. Milltek told me that was external diameter, but thinking about it, the thickness of the stainless can't be that much so a 70mm cat is probably best. Thanks!
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Old 01-30-2017 | 09:27 PM
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Yeah, id be surprised if you were ever quoted the I/D. Most common would be to go by O/D. So you will find a 70mm de-cat will be 70mm O/D, not I/D.
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Old 02-01-2017 | 10:04 PM
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It's 70mm O/D then splits to ~55mm if I remember correctly, 1.5mm thick walls.
70mm decat is the way to go
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Old 02-02-2017 | 12:19 AM
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Brilliant, thanks for that info. I think maybe I look at the invidia 70mm in parts for sale thenl
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