Originally Posted by CR41G_86

fiesta zetec s rear axel bolts straight on to the ka which would then allow st170 rear disc set up to directly bolt to the zetec s back axel.

fiesta zetec s axel is longer than the ka standard unit and would make the rear stance of the car wider ( not sure weather it would fit with standard arches or weather you need to fit euro arches or sport arches so the wheels dont stick out)