Reds
REDS RACING 321 ESTREMO - X Line ENBU0044 O.S. Nitro Engine .21 Buggy Truggy 761000974882
REDS RACING 321 ESTREMO - X Line ENBU0044 O.S. Nitro Engine .21 Buggy Truggy 761000974882
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Reds Racing is enthusiastic to introduce an important evolution within its high-end off-road nitro engine lineup.
As part of this development, Reds Racing unveils a brand-new engine family called the X Line, which will run alongside the current flagship 721 Superveloce Gen5 – S Line Version 2026.
The development of the new 321 ESTREMO™ represents an important collaboration between REDS Racing and one of the most respected companies in the RC engine industry.
REDS Racing was founded by Mario Rossi, one of the most influential figures in RC engine history and co-founder of the legendary Novarossi brand since 1984. His decades of experience in high-performance racing engine design have helped shape some of the most successful engines ever produced.
By combining REDS Racing’s Italian racing engineering and development philosophy with the manufacturing expertise and precision of Japanese engineering, this project brings together the best of two worlds.
The result of this collaboration is a new engine platform designed to deliver outstanding performance, reliability, and drivability—an engine that represents the perfect blend of Italian racing passion and Japanese manufacturing excellence.
Advanced 3-Port Engine Design
From a technical standpoint, the 321 features a 3-port configuration designed to deliver increased torque, resulting in a driving feel that differs significantly from the current 721 platform.
The cylinder and sleeve design has been developed starting from the classic Japanese 3-port architecture, well known for its simplicity, reliability, and strong torque characteristics. Reds Racing engineers further refined this concept by introducing additional internal flow channels designed to guide and optimize the air-fuel mixture movement inside the cylinder.
These channels improve cylinder filling efficiency, enhancing the combustion process and increasing overall performance.
The cylinder is paired with an ultra-lightweight piston, specifically designed to reduce reciprocating mass. By minimizing the moving masses inside the engine, Reds Racing engineers were able to further improve engine responsiveness and maximize overall power output.
The result is a design that maintains the simplicity and drivability of a traditional 3-port engine, while incorporating advanced details that improve internal fluid dynamics and overall engine efficiency.
The new X Line debuts with the 321 ESTREMO™, a 3-port engine
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