For the racer that needs to mount an NPT pipe thread fitting where space may be an issue RBS carries this billet alum. 45 degree elbow that is just the ticket. Anodized for corrosion and galling protection as well as lightweight as it is made from forged billet alum.
Fitting has a two sided wrench flat to allow the racer to tighten the fitting with ease. Both sides are the same NPT size with one side being male thread and the other side being male thread.