Mazda MX-5 NA6CE ITB Adapter Plate – 4AGE 20V Silver Top / Black Top Conversion | Velocity Race

Mazda MX-5 NA6CE ITB Adapter Plate – 4AGE 20V Conversion

 

Upgrade your Mazda MX-5 Miata NA6CE (1.6L) with the Velocity Race Billet ITB Adapter Plate designed to install Toyota 4AGE 20V Individual Throttle Bodies.

 

This precision CNC-machined runner adapter allows fitment of:

• 4AGE 20V Silver Top (Round intake shape)

• 4AGE 20V Black Top (Heart-shaped intake pattern)

 

The runner length is carefully calculated to position the ITB mechanism closer to the cylinder head. This design improves airflow efficiency, reduces turbulence, and shortens intake travel distance — enhancing throttle response and torque characteristics.

 

Engineered for direct fitment to factory mounting points while allowing use of the stock fuel rail and injectors.

 

Velocity Race specializes in CNC-machined automotive performance components for enthusiasts and motorsport builds worldwide, with worldwide shipping available.

 

 

Compatibility

• Mazda MX-5 Miata NA6CE 1.6L

• Mazda Roadster NA6CE

• 4AGE 20V Silver Top ITBs

• 4AGE 20V Black Top ITBs

 

 

Features and Benefits

• CNC-machined billet aluminum construction

• Designed for 4AGE 20V ITB conversion

• Optimized runner length for improved airflow

• Reduced turbulence and improved throttle response

• Direct bolt-on to stock engine mounting points

• Retains factory fuel rail and injectors

• Includes 4 vacuum outputs and vacuum manifold

• Ideal for naturally aspirated performance builds

 

 

Material and Finish

• Material: Billet aluminum

• Standard Finish: Brushed aluminum

 

 

Anodizing Options

• Black

• Purple

• Blue

• Gold

• Red

• Silver

  Additional 4–5 days processing time applies for anodized finishes.

 

 

Package Includes

• 1 × ITB Adapter Plate (Runner)

• 4 × Vacuum outlets

• 1 × Vacuum manifold

• Necessary installation hardware

 

 

Important Note

• ITB installation performs best with higher compression and upgraded camshafts

• Installation on a stock engine is possible but may not maximize performance gains

• Designed for cable-actuated throttle bodies

• Electronic throttle setups may require pedal conversion

• Accelerator cable modification may be required

• Aftermarket performance component by Velocity Race

• Not an OEM product

 

 

Installation

• Professional installation strongly recommended

• ECU tuning required for optimal performance