Description

Key Features & Benefits

• Genuine JDM Mazda 20B REW 3-rotor engine
• Original twin-turbo sequential setup
• Automatic transmission included
• Imported from a 1990–1995 Mazda Eunos Cosmo
• Legendary factory rotary performance
• Rare collector-grade JDM engine
• Excellent condition
• Massive aftermarket tuning potential
• Perfect for custom engine swap projects
• Ideal for professional restorations
• Smooth high-RPM rotary power delivery
• Increasingly difficult to source worldwide

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Detailed Product Description

One of Mazda’s Greatest Rotary Engines

The JDM 20B REW 3-Rotor Twin-Turbo Mazda Eunos Cosmo Engine represents the ultimate evolution of Mazda’s production rotary engine program. Unlike the more common 13B engines found in the RX-7, the 20B features an additional rotor, increasing displacement and delivering exceptionally smooth torque across the entire RPM range.

Built exclusively for the luxury-oriented Mazda Eunos Cosmo, the 20B REW combined cutting-edge engineering with twin sequential turbochargers to create one of the most advanced Japanese performance engines of the 1990s.

Today, original 20B engines are becoming increasingly scarce, making complete, authentic JDM examples highly desirable among collectors and rotary enthusiasts.

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Complete Engine Package

This genuine JDM engine package includes:

• Mazda 20B REW 3-Rotor Engine
• Factory Sequential Twin Turbo System
• Automatic Transmission
• Intake Assembly
• Exhaust Manifold
• Turbochargers
• Factory Sensors
• Engine Accessories
• Original Components Attached to Engine

Everything included with the engine remains together, helping simplify future installation and reducing the need to source difficult-to-find OEM components.

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Engine Specifications

Engine Model: Mazda 20B REW

Configuration: 3-Rotor Wankel Rotary

Displacement: 1,962 cc (654 cc x 3 Rotors)

Aspiration: Sequential Twin Turbocharged

Fuel System: Electronic Fuel Injection

Transmission: Automatic

Vehicle Origin: Mazda Eunos Cosmo

Production Years: 1990–1995

Fuel Type: Premium Unleaded

Cooling: Liquid Cooled

Origin: Genuine Japan Domestic Market (JDM)

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Why the 20B REW Is So Special

The 20B REW has earned legendary status for several reasons.

Unlike conventional piston engines, the rotary design delivers exceptional smoothness thanks to fewer moving components and balanced operation. The addition of a third rotor further improves torque production while maintaining the compact dimensions rotary engines are famous for.

Combined with Mazda’s sequential twin-turbo system, the result is an engine that provides outstanding drivability with tremendous horsepower potential.

For many enthusiasts, the 20B remains the ultimate factory-built rotary engine.

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Ideal for High-End Engine Swaps

Because of its compact dimensions and impressive performance, the 20B REW has become one of the most popular engines for custom builds.

Common applications include:

• Mazda RX-7 FD3S
• Mazda RX-7 FC3S
• Mazda RX-8
• Mazda Cosmo restorations
• Custom drift builds
• Time attack cars
• Street performance builds
• Show-quality JDM projects

With proper fabrication, the 20B can also be installed into numerous custom chassis.

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Legendary Performance Potential

Even in factory configuration, the 20B REW offers remarkable performance.

Builders often upgrade these engines with:

• Larger turbochargers
• Standalone ECU systems
• High-flow fuel injectors
• Upgraded intercoolers
• Performance ignition systems
• Street porting
• Bridge porting
• Peripheral port conversions
• High-capacity fuel systems

Because of its strong rotary architecture, the 20B continues to be one of the most respected performance platforms in the rotary community.

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Genuine JDM Quality

Every genuine Japanese-market engine benefits from Mazda’s exceptional manufacturing standards.

This engine offers:

• Authentic OEM engineering
• Original factory turbo system
• Genuine Mazda casting
• Proven rotary reliability
• Excellent aftermarket support
• Rare collector value

Unlike rebuilt replicas or incomplete engine packages, this authentic JDM engine preserves originality while providing an excellent platform for future upgrades.

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A Rare Investment for Enthusiasts

The Mazda 20B REW is no longer produced, and complete engines continue to become increasingly difficult to locate.

As collector demand continues to rise worldwide, original JDM 20B engines have become one of the most valuable rotary engines available.

Whether you intend to install it or preserve it as part of a collection, owning a genuine 20B REW represents an investment in one of Mazda’s most iconic engineering achievements.

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Why Choose This Product?

The JDM 20B REW 3-Rotor Twin-Turbo Mazda Eunos Cosmo Engine stands apart from other rotary engines because of its rarity, engineering excellence, and incredible performance potential.

Reasons enthusiasts choose this engine include:

• Genuine JDM Mazda engine
• Original 3-rotor configuration
• Factory twin-turbo setup
• Automatic transmission included
• Rare collector’s item
• Excellent tuning platform
• Legendary rotary performance
• Smooth power delivery
• Perfect for premium engine swaps
• Increasing long-term value

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Perfect For

• Mazda Eunos Cosmo restorations
• RX-7 FD3S engine swaps
• RX-7 FC3S conversions
• RX-8 custom builds
• Professional performance shops
• Rotary collectors
• JDM enthusiasts
• Show car projects
• Drift builds
• Time attack vehicles
• High-end custom fabrication

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Frequently Asked Questions

Is this a genuine JDM 20B REW engine?

Yes. This is an authentic Japan Domestic Market Mazda 20B REW engine sourced from a Mazda Eunos Cosmo.

Is the automatic transmission included?

Yes. The original automatic transmission is included with the engine package.

Is this the factory twin-turbo engine?

Yes. It features Mazda’s original sequential twin-turbo system.

What vehicles can this engine be installed into?

It is commonly swapped into RX-7 FD3S, FC3S, RX-8, Eunos Cosmo restorations, and many custom performance builds.

Is this engine suitable for high-performance builds?

Absolutely. The 20B REW is widely regarded as one of the best rotary platforms for performance applications.

Why is the 20B REW so valuable?

Production numbers were limited, and complete original engines have become increasingly rare, making them highly sought after worldwide.

Do you offer shipping?

Yes. Shipping is available domestically and internationally. Contact us for a personalized shipping quote.

Can I request additional photos?

Yes. Additional photos, videos, and compression information can be provided upon request.

Don’t miss the opportunity to own one of Mazda’s most legendary rotary engines. This JDM 20B REW 3-Rotor Twin-Turbo Mazda Eunos Cosmo Engine is a rare find for collectors, restorers, and performance enthusiasts seeking genuine JDM quality. Complete with its original automatic transmission and factory twin-turbo setup, this iconic powerplant is ready for your next project. Contact us today for availability, additional photos, shipping options, or to reserve this exceptional rotary engine before it’s gone.

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