84-91 Mazda 13B 5" Supercharger Lower Intake Manifold (CM-8500511)
Fits all 84-91 13B 4-port & 6-port engines.
For use with our 5" Camden Supercharger.
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.