bridge port 13B

  • Mazda rotary porting plate for sale, 12A 13B port plate, RX-3 RX-4 RX-7 SA22C rotary upgrade, bridge port 12A 13B, peripheral port rotary plate, Mazda rotary engine performance part, classic Mazda engine porting, OEM Mazda rotary upgrade, SA22C RX-7 rotary component.

    Mazda Rotary Porting Plate – 12A / 13B Performance Upgrade for RX-3, RX-4 & RX-7 SA22C

    $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.

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  • Rebuilt Mazda RX-7 13B Turbo

    Rebuilt Mazda RX-7 13B Turbo Bridge Port Motor (Series 5 Update) – Fresh Performance Rotary Engine Block

    $1,700.00

    If you’re searching for a professionally rebuilt rotary engine that combines proven Mazda engineering with performance-focused upgrades, this Rebuilt Mazda RX-7 13B Turbo Bridge Port Motor (Series 5 Update) is an exceptional opportunity.

    Built from a genuine Mazda Series 5 13B turbo motor, this engine has been freshly rebuilt and has never been started since assembly. The motor remains wrapped in protective plastic and was only briefly uncovered for photography purposes, ensuring it arrives in pristine condition.

    What makes this build particularly desirable is its rare large dowel configuration, featuring front and rear plates matching the sought-after Series 6 design. Combined with a professionally executed bridge port, new race apex seals, fresh corner seals and springs, and a new water retention kit, this rotary engine is designed for enthusiasts who demand reliability, performance, and long-term durability.

    Whether you’re restoring a Mazda RX-7, building a high-performance street car, or preparing a serious track machine, this rebuilt 13B turbo engine provides an excellent foundation for your next project.

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