I have an old set of cossie blue injectors, same size/fittings as a grey 403 but not good for as much hp....still able to fuel equivalent of 62bhp more (based on what it produces on a cossie).

I doubt your adding 50+bhp with a 5th injector so if anyone wants one theyre all working fine and i'll split the set if 2 people ask for one..

Dan