it really doesnt matter if it a corsa or contessa, they are both pretty much the same. the corsa has a lil better porting, but plenny guys out here buy contessas because they cost less and just port them to corsa specs or even better. you can mini stroke either one and get good performance. your going to pay a lot for a polini piston, and you also wont get the best performance using a stock dio head, you need the polini corsa head.