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.
For Sale: Rebuilt Mazda RX-7 13B Turbo Bridge Port Motor (SER5 Update) – Block Only
If you’re searching for a serious foundation for your next rotary performance build, this Rebuilt Mazda RX-7 13B Turbo Bridge Port Motor (SER5 Update) – Block Only represents an increasingly rare opportunity. Freshly rebuilt and never started, this engine combines the legendary performance potential of Mazda’s 13B turbo rotary platform with desirable SER5 large dowel upgrades and professional internal enhancements.
Built specifically for enthusiasts who understand the value of a properly prepared rotary engine, this motor features a bridge-ported configuration for improved airflow, brand-new race apex seals, new corner seals, fresh springs, and a new water retention kit. The engine remains essentially untouched since assembly and was only removed from protective wrapping for inspection and photographs.
Whether you’re restoring an FD RX-7, building a dedicated track machine, assembling a high-horsepower street car, or creating a custom rotary-powered project, this rare SER5 large dowel engine provides an exceptional starting point.
Rotary enthusiasts know that finding a fresh, professionally rebuilt 13B turbo engine with the desirable SER5 update is becoming increasingly difficult. This engine eliminates the uncertainty often associated with used rotary motors and provides a proven platform ready for completion according to your specific goals.
