the wheels are however they came from BMW, including the visible separation where the two castings meet. Those are some cheesy alloys.
The Jet-Hot is relatively thin, no clearance problems with the head. I did use a 1" sanding drum (actually, a flapper wheel) on the insides of the crossovers to get enough clearance for them to slide on (Jet-Hot coats the insides of the pipes, too). It's pretty stout stuff; minor bending of the crossovers at the ends, away from the slit, doesn't crack the coating. On the down side, the pits, etc are still there and probably worse than when they started, since they bead blast all the rust and stuff away. Of course, being satin black, they don't really show either.
