Molds are expensive, so you have to spread the cost over many produced units. Probably if not many cars are made, cost isn't very different. Regarding the extr

Molds are expensive, so you have to spread the cost over many produced units. Probably if not many cars are made, cost isn't very different. Regarding the extra 30hp, I think they probably come from the ability to slightly increase the RPMs because of the weight reduction.