-
$1,200.00
The Mazda 12A Rotor Housings – Excellent Condition offer rotary enthusiasts, engine builders, and restoration specialists an increasingly rare opportunity to secure genuine 12A rotary engine components in highly desirable condition. Finding quality rotor housings for classic Mazda rotary engines has become significantly more difficult over the years, making clean, usable housings a valuable asset for anyone planning a rebuild, restoration, or performance-oriented rotary project.
These rotor housings have been carefully inspected and present exceptionally well for their age. They show no signs of warpage or shrinking, and there are no cracks around the spark plug holes—two of the most common concerns when sourcing used rotary engine housings. Aside from one very small chrome flake near the exhaust port, the housings remain clean, structurally sound, and fully usable for a wide range of applications.
Whether you’re rebuilding a classic Mazda RX-7, restoring a vintage rotary-powered vehicle, assembling a spare engine, or building a custom performance motor, these Mazda 12A Rotor Housings – Excellent Condition provide a strong foundation for a successful rotary build.
-
$2,000.00
The Mazda 13B Generator Short Block – S5 T2 Components is a rare rotary engine assembly originally imported into the United States during the early 1990s for industrial stationary generator applications. Unlike conventional automotive rotary engines, this unique powerplant was designed for propane-fueled operation and long-term reliability under continuous-duty conditions.
Built using a specialized combination of genuine Mazda second-generation rotary components, this short block offers a unique opportunity for rotary enthusiasts, engine builders, restorers, and performance tuners seeking hard-to-find OEM parts. Featuring desirable S5 Turbo II end plates, S5 rotor housings, 13BT eccentric shaft, and factory one-piece apex seals, this engine provides an exceptional foundation for a custom turbocharged build or specialized rotary project.
Stored in a climate-controlled workshop environment, the engine spins freely and demonstrates strong compression, making it a highly attractive candidate for performance applications, rebuilds, or parts harvesting.
Whether you’re building a street-driven RX-7, a dedicated race car, a custom rotary swap project, or simply collecting rare Mazda rotary components, this discontinued generator engine represents a unique opportunity to secure genuine OEM hardware that is becoming increasingly difficult to source.
-
$300.00
The Mazda Rotary Porting Plate – 12A / 13B (RX-3, RX-4, RX-7 SA22C) is a highly sought-after performance component designed for rotary enthusiasts looking to maximize airflow and unlock additional performance from their engine build. Whether you’re rebuilding a classic Mazda rotary engine, performing a bridge port conversion, or planning a full peripheral port race engine, a quality porting plate is an essential part of the process.
Designed for compatibility with Mazda’s legendary 12A and 13B rotary engines, this porting plate is suitable for a wide range of classic applications, including the Mazda RX-3, RX-4, and first-generation RX-7 SA22C. Built to OEM standards and engineered to withstand the demands of high-performance rotary engines, this component provides the foundation for increased airflow, improved engine breathing, and enhanced power potential.
For rotary enthusiasts, airflow is everything. The Mazda Rotary Porting Plate helps optimize intake flow characteristics while supporting a variety of porting strategies, making it an excellent choice for both street-driven and track-focused builds.
-
$2,500.00
New FD3S 13B-REW Rotary Engine Core – Housings, Rotors, Seals, Plates & Shaft | Zero Run Time
For rotary enthusiasts, builders, and restoration specialists, finding a truly fresh foundation for a Mazda RX-7 FD3S engine build is becoming increasingly difficult. The New FD3S 13B-REW Rotary Engine Core – Housings, Rotors, Seals, Plates & Shaft | Zero Run Time offers a rare opportunity to start with brand-new core components rather than rebuilding worn or questionable parts.
Designed specifically for the legendary Mazda RX-7 FD3S platform, this complete engine core package includes the essential internal components required for a premium-quality rotary build. Featuring new rotor housings fitted with power seals, rotors, iron plates, eccentric shaft, and a complete seal package, this assembly provides the ideal starting point for everything from OEM restorations to serious street and track builds.
Whether you’re restoring a collector-grade FD RX-7, building a reliable street car, or planning a high-horsepower performance setup, this zero-run-time engine core eliminates many of the uncertainties associated with used rotary components.
Built around genuine Mazda 13B-REW architecture, this package represents one of the best foundations available for enthusiasts seeking reliability, performance, and long-term durability.
