Wow bumping a really old thread here...
The diagram that lMason linked to shows a few parts besides the wheel and the horn. It shows the hub, a bellows, a ring that goes between the wheel and the hub, the steering wheel and the bolts.
My question is this... I have a Momo Porsche logo horn that doesn't fit the hole in a Sparco wheel I have, a wheel I know is compatible size-wise with Momo wheels. It appears to me that the horn really should mount to that metal ring, not to the wheel. Does that ring come with the hub adapter, or should it be with the wheel? (Ie, I'm SOL)...
Anyone know for sure? The wheel I have is from a friend and if I can't get the horn button to fit, I'll just give it back to him and buy a Prototipo or something, but this is saving me $200.
