If you’re searching for one of the most legendary rotary engines ever produced, the JDM 20B REW 3-Rotor Twin-Turbo Mazda Eunos Cosmo Engine is an exceptional opportunity. Highly sought after by collectors, performance enthusiasts, and professional builders, the 20B REW is widely regarded as the pinnacle of Mazda’s production rotary engine technology.
Originally found in the 1990–1995 Mazda Eunos Cosmo, this genuine JDM powerplant features a factory 3-rotor sequential twin-turbocharged configuration paired with its original automatic transmission. Renowned for its smooth power delivery, unmistakable rotary sound, and enormous tuning potential, the 20B REW remains one of the rarest and most desirable Mazda engines ever built.
Whether you’re planning a high-end engine swap, restoring a classic Eunos Cosmo, or building a one-of-a-kind RX-7, this complete 20B engine package provides an authentic foundation for your next project.
Opportunities to own an authentic early-production Mazda rotary engine are becoming increasingly rare. This Mazda 10A Rotary Engine – Used (Engine No. 0866) represents a significant piece of automotive history and offers enthusiasts, collectors, and restorers the chance to acquire one of Mazda’s pioneering Wankel rotary powerplants.
Originally developed during Mazda’s groundbreaking rotary engine era, the 10A was among the first production rotary engines to establish Mazda’s reputation for innovation and performance. Featuring a compact twin-rotor design with a displacement of 982cc, the 10A delivered impressive power and smoothness that set it apart from conventional piston engines of its time.
Whether you’re restoring a Mazda Cosmo Sport 110S, rebuilding a Mazda R100 Rotary Coupe, completing an RX-2 restoration, or simply adding a rare rotary engine to your collection, this engine offers authenticity, historical significance, and outstanding project potential.
Engine Number 0866 is being offered in used condition and is sold as-is, making it an excellent candidate for restoration, rebuild, preservation, or display purposes.
The Mazda 20B 3-Rotor Engine – Clean Build is one of the most iconic and desirable rotary engines ever produced, offering a rare combination of smooth power delivery, high-revving performance, and unmistakable Mazda engineering heritage.
This engine is built around the legendary 20B triple-rotor platform—widely respected in the rotary community for its strength, tuning potential, and unique driving character. Unlike standard 13B engines, the 20B delivers more displacement, more torque, and a noticeably stronger mid-range, making it a favorite for serious performance builds.
This Mazda 20B 3-Rotor Engine – Clean Build comes as a professionally refreshed unit with multiple new internal components, making it a strong foundation for high-performance applications, RX-7 swaps, drift builds, or collector-grade projects.
Whether you’re a rotary enthusiast chasing big horsepower or a builder looking for something truly rare, this engine stands out as a premium, hard-to-find option in today’s JDM market.
