This performance handbook is an outstanding 1st book for approaching upgrades to the Miata. It covers all years 90-99 and deals with nice, high level information. (it is not a step by step recipe, but takes you through various aspects of performance such as tire/wheels, intake, exhaust, suspension, etc.) Very well written, 'lightly' technical, great, great information with no BS and no hidden agendas (ads, etc.) Easy to read, laid out nicely. Also has sections on racing Miatas and appearance items. I highly recommend this book to anyone who is considering doing any performance upgrade to their beloved Miata!