Currently running venom 550cc injectors but I've heard bad things about them, a buddy with an FD has some 550cc injectors he said I can have. All the info I've found online has only been miata owners running FC injectors though. Will the FD ones be compatible? Here's the list of compatibility parts, I didn't see FD on there but I don't see why they wouldn't work? They're both side feed.

http://miataturbo.wikidot.com/fuel-injectors

 

No. The FD used side feed injectors. You need a top feed. They're also 550 primary and 850 secondary. So they're not a matched set of four.