Which exhaust manifold do I have?

Technical Area Engine, Transmission, Exhaust etc
1

Can anyone identify the tubular exhaust manifold on our 1.6 '92 Eunos Roadster? The exhaust sensor is located in the top of #4 pipe, close to the head. #2 pipe has a plate, which other than Japanese text, is stamped “RS ‘a star symbol’ R” and “E1-4002”.
Thanks.

2

Hello , possibly one of these RS-R Exhaust Manifold 4-2-1 Type Made Of Stainless Steel | Exhaust Systems | Croooober

3

RS*R

They haven’t made headers in years.

4

Yes, that’s the one. Many thanks.

5

Thank you.