[jsveb]

No offense, but your questions are a little hard to understand, being from Denmark I struggle with my tech English vocabulary myself.

If you are trying to fit the biggest IC possible under an oem 3.3 tail and onto a Carrera 3.2 manifold, I think some of the guys would know.

Or, you could put together a cartboard "IC" and just cut and tape it together until you figure out the optimum sizing.