For Mazda applications.

Fits all 84-91 turbo and non-turbo engines, 4-port & 6-port.

Might need to port match it to your engine a little.

If you are going to pre-mix your fuel, then you might want to block off the oil metering pump ports, located above the center intake port(s).

If you want to use the stock oil metering system then you will need to use oil metering injectors.