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
BMW V12 LM aerodynamics and safety. Debuting at the 1998 24 Hours of Le Mans test day in May, the two V12 LM chassis set times which were not favorable, their best lap placing them 11th behind factory entries from Porsche, Toyota, Nissan, and Mercedes-Benz, all of which were running grand tourer-style cars instead of the theoretically faster Le Mans prototypes. By the time qualifying for the race came around in June, the BMWs had improved to 6th fastest in qualifying, placing behind two Porsches, two Mercedes, and a Toyota. Unfortunately, during the race both cars suffered quickly. Vibrations were detected in the