Where can I source fuel injectors for a Mazda RX-7 FC?

To point you in the exact right direction, I need to know your FC's year and whether it is Naturally Aspirated (NA) or a Turbo II. The NA engines use 460cc injectors while the Turbos use 550cc, and Mazda switched from low impedance (3 ohm) to high impedance (13 ohm) for cars built after June 1987 ².

Depending on your goals, here is where the rotary community typically sources them:

For Stock Replacements If you just want factory-sized replacements, check rotary-specialty vendors like Mazdatrix, Atkins Rotary, or Ray Crowe ⁸. Stock 550cc and 460cc injectors can also often be found on eBay or through Five O Motorsport ^{13 9}.

For Upgrades (Modified/Turbo Builds) If you are running a standalone ECU and upgrading your secondary rail for a bigger turbo, Marren Fuel Injection (injector.com) is highly recommended. Their "Pro Import" line is known to drop right into the stock secondary fuel rail without requiring modification ¹¹. Vendors like rx7.com and RX7Store are also standard go-to sources for larger Bosch setups, like 1600cc secondaries ¹³.

Rebuilding Your Originals (Highly Recommended) If you still have your original factory injectors and they are just clogged or causing a misfire, sending them out is usually much cheaper and more reliable than buying new aftermarket replacements. The community heavily relies on RC Engineering (rceng.com) or Marren to ultrasonically clean, flow-test, and balance them ⁷.

If you want to tackle it yourself, FC injectors can be rebuilt at home using standard EV1 rebuild kits, which include new external o-rings, pintle caps, and filter screens ⁸.

Let me know your year, trim, and whether you are on the stock ECU, and I can narrow this down further for you.