For Sale: Rebuilt Mazda RX-7 13B Turbo Bridge Port Motor (SER5 Update) – Block Only

Rebuilt Mazda 13B-REW Bridge Port Engine – Series 5 (Block Only)

Elevate your build with this professionally rebuilt 13B Bridge Port motor. This “block only” (keg) configuration is based on the updated Series 5 (S5) architecture, featuring improved casting strength and oiling passages. The aggressive bridge porting significantly increases intake air volume, making this the ideal foundation for high-horsepower single-turbo conversions where top-end performance is the priority.

Performance Porting & Build Specs

• Bridge Ported Intake: Precision-cut bridge ports on the primary and secondary plates for maximum flow and the signature rotary exhaust note.

• Series 5 (S5) Internals: Utilizes S5 rotors (9.7:1 compression) and stationary gears for improved high-RPM stability compared to S4 components.

• Fresh OEM Seals: Rebuilt using genuine Mazda or high-performance multi-piece apex seals to ensure maximum compression and longevity.

• Balanced Rotating Assembly: Every unit is precision-balanced to reduce vibration and ensure smooth operation up to 8,500+ RPM.

Product Highlights

• “Brap” Idle Aesthetic: Delivers the unmistakable aggressive idle sound highly coveted by rotary purists.

• Top-End Power: Optimized for high-boost applications, providing a significant power increase over standard street-ported engines.

• Block Only (Keg): Includes the front, center, and rear irons; rotor housings; rotors; and e-shaft. Note: No manifolds, turbos, or accessories included.

• JDM Series 5 Updates: Benefits from the reinforced center iron and improved oil pressure regulators found in the late-model FC3S/FD3S evolution.

Technical Specifications