Radium Rotary Engine Injector Seat (Single) - Mazda RX-7 FD/Cosmo JC (13B/20B) M081 it’s a specific S chassis

it’s a specific S chassis unit required with the opposite bolt pattern orientation

then CLICK HERE for our 'custom' Mechanical Fuel Pump kit listing

Mitsubishi EVO VIII

V-Band (Outlet) - Suit Turbosmart Pro-Gate50 (50mm) External Wastegates

So to seal the lower section to the upper we designed a dual stepped recess with the internal step protruding further down following the gas flow

Radium Rotary Engine Injector Seat (Single) - Mazda RX-7 FD/Cosmo JC (13B/20B) M081 it’s a specific S chassisThese are the same machined aluminum injector seats used in Radium fuel rails for Mazda Eunos Cosmo and RX 7 rotary engines. They are required when converting the OEM 16mm injector seat's counterbore to 14mm which is more common with popular injector lower O rings. They simply "pop" into the OEM injectors bore. They were designed specifically to be compatible with or without the OEM fuel injector diffusers installed. They seal to the machined injector