Max Power RC Nitro Engine Bearing Novarossi PAT-05

Max Power RC Nitro Engine Bearing Novarossi PAT-05

Not sure what engine this is for (Part label has faded so can't get the number) Bearing is marked PAT-05 Novarossi in the side. Bearing is approx 21x11x5mm (hard to be exact with a ruler) 

Cheap to clear as I don't know what this fits.