Pontiac Streamliner was created in 1942.

Millions because only about 196 were made

Fastest Motorcycle Speed

America's Dave Campos, riding a 7-m (23-ft) long streamliner named Easyriders, set American Motorcyclist Association (AMA) and Federation Internationale de Motorcyclisme (FIM) absolute speed records with an overall average speed of 518.450 km/h (322.150 mph), and completed the faster run at an average of 519.609 km/h (322.870 mph), at Bonneville Salt Flats, Utah, USA, on July 14, 1990. The Streamliner weighed 1133.9 kg (2,500 lb) and was powered by two 1,500 cc Ruxton Harley-Davidson engines.

The New York Central Streamliner JAMES WHITCOMB RILEY was inaugurated late in 1941. The locomotive was a streamlined steam locomotive originally used on the MERCURY. The cars were 4 BUDD stainless steel coaches and three rebuilt heavyweight cars reconstructed by NYC Beech Grove Shops. This train continued in service till replaced in the late 1940s by an all-new BUDD streamliner. NYC Hudson locomotives (steam) replaced the Pacifics in the 1940s. The Hudsons would run the train until about 1954. After that date, diesel locomotives were the usual power

I think you might be referring to The Flying Yankee. It was a diesel-powered streamliner of Zephyr design built in 1935 for the Maine Central Railroad. It was on display in Maine but is now being restored elsewhere.