naturally aspirated 13B

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  • 13B 6-Port Bridgeport Rotary Engine

    13B 6-Port Bridgeport Rotary Engine – High RPM Performance Build

    $2,500.00

    The 13B 6-Port Bridgeport is a serious rotary performance build designed for drivers who want more than a stock 13B can deliver. This engine features a professionally executed full Bridgeport on the 6-port 13B platform, completed entirely in-house with precision machining and careful attention to port geometry.

    Bridgeporting is one of the most recognized modifications in the rotary world, offering increased airflow and improved high-RPM breathing. The result is a more aggressive powerband, stronger top-end performance, and the unmistakable sound that has made bridgeported rotary engines legendary among enthusiasts.

    Whether you’re building a dedicated drag car, a track-focused RX-7 or RX-8, or a high-performance street machine, this engine provides a solid foundation for naturally aspirated or custom performance applications where airflow and RPM capability are priorities.

    13B 6-Port Bridgeport Rotary Engine – High RPM Performance Build

  • 13B 6-Port Street Port Rotary Engine for Sale

    13B 6-Port Street Port Rotary Engine for Sale – Fresh Rebuild Ready for RX-7 Swaps

    $2,000.00

    13B 6-Port Street Port Rotary Engine

    If you’re looking for a rotary engine that delivers the perfect balance of performance, drivability, and reliability, this Another 6-Port Street Port 13B Rotary Build, Freshly Put Together and Ready for Action is an excellent choice.

    Built with enthusiasts in mind, this freshly assembled 13B combines the proven reliability of the 6-port design with the added airflow and performance benefits of a professionally executed street port. The result is an engine that offers a noticeable increase in power, crisp throttle response, and the unmistakable rotary sound that Mazda enthusiasts love.

    Whether you’re restoring an RX-7, building a weekend street machine, completing a custom swap, or upgrading your current rotary setup, this engine provides a solid foundation for a fun and dependable performance build.

    Price: $2,000 USD / $2,900 AUD