Been looking after the shop today Jon so the picture was taken there.
Richie - Its one of Sean's RHD manifolds but I don't know what size!!! That may sound a bit odd but I feel my engine is on the boarder line so either would suit it and I probably couldn't tell the difference anyway. The deciding factor was this one coming up for sale at half price. With regard to fit, its designed for a 240z so surely they wouldn't be able to sell them if they didn't fit?
Sean was selling these on eBay for a while a few months back. I nearly picked one up as they were a great deal at the prices they were going for. Wish I had now tbh to put on the parts shelf.
FYI, the Fujitsubo I have on my car is 1 3/4" (45mm) primary. That's on a 200-and-something HP L28. Is it offering a benefit or impediment? - my seat of pants dyno says benefit over the naff MSA manifold and system it used to have. In Japan, you see manifolds with 45mm primaries like the Fujitsubo on L20s, nevermind on L28s, 3.1s, 3.2s etc. Make of that what you will...
The fitment issue I recall was that the Y-pipe design means that you need to take a mallet to the front corner of the floorpan/tunnel to make room for it. I've seen one photo on Facebook where someone has actually cut the floor out to make room, presumably to fabricate a new piece to give clearance. This would be my prime concern - there's no way I would redesign my car with blunt-force trauma to fit an exhaust (again... don't ask
).