Porsche’s Carrera GT nearly never happened; its V10 engine was designed in 1992, shelved, revived, and shelved again before finally reaching production in 2004, funded in part by profits from the Cayenne SUV that had once stolen its budget. Only 1,270 were built through 2006, each one carrying racing details like a wood shift knob borrowed from the Porsche 917 and a left-side ignition switch built for Le Mans-style starts. Read on to find out how a shelved engineering project became one of the last analog Porsche supercars ever built.