I purchased a used Gemini 60mm system and noticed that the PO was definitely running 2.5" gaskets but the pipe id itself is 60mm (closer to 2.25"). The ID of the gasket is a good 1/8" larger than the ID of the pipe - But a 2.5" gasket looks like it will line up with the flange okay.

I see Greddy make 60mm exhaust gaskets, is that what I should be going for here? I remember he mentioned an exhaust leak, I wonder if that was the problem..?

Also, I wasn't too impressed with the collector gaskets Berk included so I bought copper - Also the wrong friggin size.

Sigh.

 

Disregard - I emailed Invidia and they said either the 2.5" or 60mm will work fine.