Confirm which exhaust connection adaptor I need to connect 3" catback to stock headers?

[SHxTGUN]

Hey so I'm in the process of buying a used Corsa Extreme catback for my 19 GT, but it's missing the X pipe inlet adaptors for the factory header connection. I was looking on Amazon but I just wanted to confirm which one to buy?

Is it 2.5"-3.0"?

or 2.25"-3.0"?

And also which combo of ID/OD would it be as well?

Any help would be appreciated.

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[SHxTGUN]

Would these be the correct ones?

https://www.amazon.com/gp/product/B07G97MD57/ref=ox_sc_act_title_1?smid=A179NYL4Z0IMDZ&psc=1

 

[SHxTGUN]

Anyone have any idea of the right size? I'm just confused on the ID/OD part of it. I know the size is 2.25-3, but 2.25ID-3OD right? Or are they both OD?

 

[Sircatsalot]

Hey I'm having the same exact problem, have you found anything?

 

[GregO]

I'm just confused on the ID/OD part of it. I know the size is 2.25-3, but 2.25ID-3OD right? Or are they both OD?

2.25" OD x 3.00" OD
I would'nt use mild steel reducers, better off to source 304 Stainless Steel

 

[Sircatsalot]

2.25" OD x 3.00" OD
I would'nt use mild steel reducers, better off to source 304 Stainless Steel

This is probably a stupid question but aren't the stock header pipes 2.5in? Why would it need 2.25

 

[GregO]

Why would it need 2.25

OEM mid connection is size on size, 2.25" x 2.25" slip coupler.
CORSA double X is expanded to accept 3.00" OD

 

[SHxTGUN]

Yup, GregO was right, it was 2.25"OD-3"OD.

I'm an idiot and chose 2.25ID-3OD and that was definetely not right and made the install more of a headache than it should've been, but the shop custom made an adaptor for me and we used that.

Also 2.25OD-3OD is a bit tougher to find. Most of the generic ones you see on Amazon are usually 2.25ID-3OD but there's barely any 2.25OD-3OD. But I'm sure you can find them, just letting you know it's (for some reason) not as common.

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