Can someone tell me the correct size coupler I need to attach a Evo style I/C to a stock LICP. I believe it's 2.25 to 2.5 but I need to be sure. Thx!! I'm in a jam this weekend and have no time to myself. I have 4 hrs. to do the swap tomorrow and forgot the coupler. Now it's a mad dash to try and find something to work. Any help would be appreciated. For the ones that say to just do it right the first time, I have no idea when I will have the oppertunity again to work on my car again and I want to get the I/C on now. LOL When I do have the time I will have the correct parts ready and waiting when I do the E85 conversion.

 

O no! I think there is measurement in the How To section.., one minute..
Correct. EvoX FMIC outlet is 2.5" diameter, Ralliart LICP inlet is 2.5" diameter.

Ralliart FMIC outlet is like 2.25" diameter, if you look at the stock coupler it has a slightly reduced section on the FMIC side, this is why you need a new coupler for the Evo-based FMIC's

That was chi's answer to your question back in May.

 

Yup. 2.5 straight through