MFR 13B PP rotor housing

This replica MFR housing is a direct replacement for the original housing from the 80’s. It’s designed to accept the original MFR intake manifold and header.
Being a later model housing it’s significantly stronger and wear resistant, giving a much greater service life than the original item.

Housing is supplied finished, ready to run.
Price is per housing.

Included:
-CNC Peripheral porting – 43mm MFR
-CNC exhaust port.
-CNC waterjacket O ringed sealing inserts (no epoxy filler required, no internal or external coolant leaks over time).
-CNC water jacket grooves (improves thermal efficiency on the spark plug side of the housing – extending chrome surface life and reducing spark plug hole cracks over time).
-CNC spark plug socket recesses.
-Oil injector port elimination.
-Polished port closing edges.
-Studs & manifold alignment dowel

Note: 43mm port option is ideal for 290-320hp street/mild race use. 48mm port option has made over 340hp in competition applications.

The repeatability of CNC porting vs hand porting has shown dyno power gains, as well as tuning consistency. This is due to equal port flow characteristics on all rotors – both intake and exhaust ports.