I am looking for any information on how to put a 13b into a 1st get, 1994-1997 Miata. I read somewhere about a guy in Japan who had a shop where he did it all the time, though obviously living in CA prevents that as an option. However, I have heard it is quite simple to do assuming you can get the adapters and mounts. I don't know off hand how much it bolt up, and how much is special stuff you would need to buy. Any information would be very helpful.

 

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I've done it. Not to hard at all.
You'll need to section/cut the K member and weld in a tube to make room for the oil pan. Custom oil pan as well as custom pickup.

12A front mounting cover, make a front mount. Make a rear mount that bolts to trans. Presto, it's in the car. Mine sits pretty damn low. Low enough I didn't even have to ding the firewall for the TII clutch slave cylinder. LOTS of people say it's so damn hard. I don't see what is so hard about it?

Keep in mind, I'm BP, high RPM no turbo. I suppose fitting a snail down there would take a bit more work, but nothing major. My motor cost me ~$100 worth of tube and angle to make mounts for. Since I did all the labor myself, it was "Free".

Mazsport makes a kit. $4000 ?!?!?! for it as well. Not sure why it's so much, but I suppose he has the market cornered on that one. Seriously, it cost me less than 100$ to bolt the thing in.

PM me if you have any questions. I'd be glad to help.