Question: What multi-day event, officially known as the National Championship Air Races, uses an engine commonly used on Hawker Sea Fury and Grumman F8F Bearcat Unlimited Class Racers?

Context paragraphs:
Hawker Sea Fury: The Hawker Sea Fury is a British fighter aircraft designed and manufactured by Hawker.  It was the last propeller-driven fighter to serve with the Royal Navy, and one of the fastest production single piston-engined aircraft ever built.  Developed during the Second World War, the Sea Fury entered service two years after the war ended.  The Sea Fury proved to be a popular aircraft with a number of overseas militaries, and was used during the Korean War in the early 1950s, as well as against the 1961 Bay of Pigs Invasion of Cuba.

Reno Air Races: The Reno Air Races, officially known as the National Championship Air Races, is a multi-day event tailored to the aviation community that takes place each September at the Reno Stead Airport a few miles north of Reno, Nevada.  Air racing is billed as "the world's fastest motor sport" and Reno is one of the few remaining venues.  The event includes demonstrations by stunt pilots.

Wright R-3350 Duplex-Cyclone: The Wright R-3350 Duplex-Cyclone was one of the most powerful radial aircraft engines produced in the United States.  It was a twin-row, supercharged, air-cooled, radial engine with 18 cylinders.  Power ranged from 2,200 to over 3,700 hp (1,640 to 2,760 kW), depending on the model.  Developed before World War II, the R-3350's design required a long time to mature before finally being used to power the Boeing B-29 Superfortress.  After the war, the engine had matured sufficiently to become a major civilian airliner design, notably in its turbo-compound forms.  The engine is now commonly used on Hawker Sea Fury and Grumman F8F Bearcat Unlimited Class Racers at the Reno Air Races.

Sweet Dreams (aircraft): The GP-5 "Sweet Dreams" was a Super Sport Class racing airplane designed by George Pereira and originally built by Gary Childs.  The aircraft was sold once to another builder before being sold to and completed by George Backovich who with the help of the designer finished it in 2007 following several modifications for its automotive engine conversion, and changing propeller manufacturers.  The aircraft was specifically built to race in the Unlimited class at the Reno Air Races.

September Fury: September Fury, given the race number 232, is a highly modified Hawker Sea Fury that is a regular racer at the Reno Air Races.

Károly Ecser: Károly Ecser (born (1934--)22 1934 in Cegléd - April 2005 in Cegléd) was a Hungarian male weightlifter, who competed in the heavyweight class and represented Hungary at international competitions.  He won the bronze medal at the 1965 World Weightlifting Championships in the +90 kg category.  He participated at the 1964 Summer Olympics in the +90 kg event finishing fifth.  Ecser had furthermore the following podium finishes at major championships: bronze in the 1965 World Championships Unlimited class (522.5 kg), bronze in the 1961 European Championships Unlimited class (455.0 kg) silver in the 1962 European Championships Unlimited class (482.5 kg), silver in the 1964 European Championships Unlimited class (490 kg) and gold at the 1965 European Championships Unlimited class (505 kg)

Grumman F8F Bearcat: The Grumman F8F Bearcat is an American single-engine carrier-based fighter aircraft introduced in late World War II.  It went on to serve into the mid-20th century in the United States Navy, the United States Marine Corps, and the air forces of other nations.  It would be Grumman Aircraft's final piston engined fighter aircraft.  Modified versions have broken speed records for piston-engined aircraft, and are popular among warbird owners.

W.A.R. Hawker Sea Fury: The W.A.R. Hawker Sea Fury is a half-scale homebuilt replica of a Hawker Sea Fury carrier fighter produced by War Aircraft Replicas International for amateur construction.

List of Hawker Sea Fury operators: The List of Hawker Sea Fury operators lists the counties and their air force units that have operated the aircraft:

Rare Bear: Rare Bear is a highly modified Grumman F8F Bearcat that dominated the Reno Air Races for decades.

Supporting paragraphs: Wright R-3350 Duplex-Cyclone Reno Air Races
Answer: Reno Air Races