but it is not competitive in SuperStock class. After what I've seen running in A Street Prepared, I might not do so good there either! The best thing to do would be to review the SCCA rules to see what model of Z3 lands in what class, and then watch a few Auto-Xs to see how the competition does. BTW, if the 4 cylinder lands in the Miata class (B stock), you're better off with a six, even in SS. Randy 99 ///M Rdstr