4A-GE 20V Exhaust header

[novocaine]

Here are some pics of the second hand import header I bought. It's got the JASMA badge with the code 051, meaning its manufacturer is Etching K S Inc. No info on that company on the web, and I suspect it's the stock header that 20v's came out with in Japan.







Need to get secondaries made and fitted.
The inner diameter of the primaries is 38mm and the joined diameter is 45mm. I have a mandrel bent 63mm exhaust with two AEM boxes.

The problem is that I need to have secondaries made. Does anyone on this forum have a header like this ? Can you perhaps provide some help as to the diameters of the secondaries?

Since it is an import header no exhaust manufacturers around here have the built a suitable system to it's spec. The diameters are different from all the other offers.