Turblown Cast FD3S Lower Intake Manifold – 13B-REW

The Turblown Cast Lower Intake Manifold for Mazda RX-7 FD3S 13B-REW is designed to improve airflow balance between rotors while maintaining strong throttle response and mid-range performance. It features equal-length, equal-bend tapered runners, revised injector positioning and includes a dedicated billet -8AN ORB fuel rail.
 
Available for Side Port engines or 25mm Semi Peripheral Port applications.
 
Choose Version
Side Port
Stock port / street port / bridgeport
4 injector positions
 
Semi PP
25mm Semi Peripheral Ports
6 injector positions
 
Key Features
Equal-length, equal-bend runners
Tapered runner design
Revised injector positioning
Billet -8AN ORB fuel rail included
O-ringed LIM-to-UIM flange
Works with OEM FD3S UIM or Turblown UIM
Clears RX-8 firewall for 13B-REW swaps
Mounting hardware included
Off-road / competition use
 
Important: Not compatible with the OEM FD3S twin-turbo system or 13B-RE UIM. The supplied fuel rail is designed for 48mm injectors with 14mm upper and lower O-rings.