The perfect combination of inovation, high quality and great performance at a mid range street price.
This new engine belongs to Reds Racing S LINE together with 721 Scuderia, Superveloce and Corsa, a new range of engines produced with different materials, from different suppliers and with new technologies.
All assembled in-house and 100% made in Italy.
The new engine features high reliability, tuning stability and fuel mileage.
Combined with specific technical changes in the porting and new materials, this 5 port engine features good power and fuel efficiency. 521 Sport guarantees excellent performance at a reasonable price.
521 Sport engine has been provided with the same aluminum carburetor as 721 engines to guarantee reliability and tuning stability.
The insulator bushing has been improved with aerospace grade ultra high strength polymer.
Furthermore, the new GEN2 carburetor features a double grab screw joint link to facilitate positioning and fitting with the any servo link layout.
REDS Racing 521 Sport features a new and unique high stiffness crankcase design.
REDS Racing 521 SPORT features new materials for piston and sleeve.
Thanks to the new 5 ports technology the new engine guarantees really good fuel mileage and smooth power band at the same time.
Every single engine is hand inspected and compression checked inside REDS Racing headquarters by Mario Rossi to achieve the highest quality standards.
It is recommendable to match the new engine only with REDS Racing original pipes, manifolds and optional parts.
We advise using REDS 2143 pipe and M manifold
