Lamborghini Miura manual indicating bigger intake valves in English size (but correct size in metric). The intake and exhaust valves in all 4 liter Lamborghini V12 remained the same throughout all models. This intake size misprint carried forward into Espada 400GT and Countach LP 400/LP 400S owners manuals as well. In 1970, Lamborghini development driver Bob Wallace created a test mule that would conform to the FIA's Appendix J racing regulations. The car was appropriately named the Miura Jota (the pronunciation of the letter 'J' in Spanish). Wallace made extensive modifications to the standard Miura chassis and engine. Weight reductions included replacing
Production car racing them in the class. These cars are commonly called "homologation specials". In British oval racing, the term "production car racing" has been used as an alternative for hot rods, as run in the West Country during the late 1960s to the mid-1970s, and a production car world championship race was held twice in the 1970s, won by Spence Morgan in 1974 and Ralph Sanders in 1975, both driving Ford Anglias. The West Country production cars were later reclassified as hot rods to come in line with the country's other promoters although this causes some confusion with the history of the