Speaking to motoring publication The Drive, Sean confessed that he’d purchased the car a whopping 17 years ago with 70,000 miles (112,654 kilometers) on the clock. He’s averaged in the ballpark of 20,000 miles (32,187 kilometers) per year ever since, thus explaining the current odometer reading of 400,000 miles (643,737 kilometers). In one go, Sean’s longest drive in the red-painted NSX was roughly 800 miles (1,287 kilometers).
The slick manual transmission had to be rebuilt after a snap ring failure at 123,000 miles (197,949 kilometers). Now sporting the short gear set and the NSX-R final drive with a 4.23 ratio, the car also had its bushings and shocks replaced at 380,000 miles (611,551 kilometers). Elsewhere, the mid-engine icon is rocking headers, an upgraded exhaust, and fancy wheels.
Produced between 1990 and 2005 over two phases (NA1 and NA2), the first-generation NSX was used as inspiration by Formula 1 legend Gordon Murray for the McLaren F1. Offered with 3.0- and 3.2-liter V6 mills, the NSX could also be had with a four-speed automatic, even though a torque-converter automatic takes away from the fun of driving a light sports car.
Exactly 18,685 units were produced over 15 years, of which 8,997 were sold in the United States of America and 7,420 were sold in Japan.
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Source : https://www.autoevolution.com/news/1992-acura-nsx-owner-clocks-400000-miles-on-the-original-engine-172203.html271