Polished Aluminum Intake Manifold for Mazda MX-5 Miata Roadster NA6CE 1.6L

Upgrade the airflow, throttle response, and performance potential of your Mazda MX-5 Miata with the Bull Boost Performance Polished Aluminum Intake Manifold, designed specifically for the B6 1.6L engine found in the NA6CE Roadster.

This redesigned intake manifold features a high-capacity plenum, extended runners, and optimized internal velocity trumpets to improve airflow throughout the engine’s operating range. It is suitable for naturally aspirated and turbocharged applications, including vehicles equipped with an automatic transmission.

Key Features

• Polished aluminum construction
• Direct-fit replacement for the original intake manifold
• Redesigned mounting flange for easier installation
• High-capacity plenum for improved engine response
• Longer intake runners for stronger performance throughout the RPM range
• Reworked internal trumpets for balanced airflow to each cylinder
• Designed for naturally aspirated and turbocharged applications
• Compatible with factory and aftermarket fuel rails
• Supports factory-style and oversized aftermarket throttle bodies
• Heavy-duty construction suitable for street and racing applications
• Flange design matches the factory cylinder-head ports for smooth, low-turbulence airflow

Optimized Airflow Design

The Bull Boost Performance intake manifold uses internally angled trumpets to optimize incoming airflow and distribute air evenly between all four cylinders. The oversized runners and high-capacity plenum help improve airflow velocity, engine response, and power delivery throughout the rev range.

On naturally aspirated applications, gains of approximately 4–10 horsepower may be possible when combined with supporting modifications such as performance camshafts, higher-flow fuel injectors, exhaust upgrades, and professional engine tuning. Actual results will vary depending on the vehicle setup and tune.

Fuel Rail and Installation Notes

The fuel-rail mounting position is inverted, which may require the fuel line to be extended or rerouted. The use of an aftermarket fuel-pressure regulator is highly recommended.

MAF sensor wiring may also need to be extended or repositioned during installation. Professional installation and standalone ECU tuning are strongly recommended to achieve proper operation and the best possible performance.

What’s Included

• 1 Bull Boost Performance Polished aluminum intake manifold
• 4 aluminum fittings with 6 mm diameter
• 1 aluminum brake-booster fitting with 8 mm diameter
• 4 aluminum plugs with 6 mm diameter
• 1 aluminum plug with 8 mm diameter

Throttle body and fuel rail are not included.

Specifications

• Vehicle fitment: Mazda MX-5 Miata Roadster NA6CE
• Engine: B6 1.6L
• Intake type: Intake manifold
• Material: Aluminum
• Finish: Polished
• Throttle-body opening: 70 mm
• Application: Naturally aspirated or turbocharged
• Fuel-rail compatibility: Factory and aftermarket fuel rails

Professional installation and tuning are recommended. Verify vehicle, engine, throttle-body, fuel-system, and accessory compatibility before ordering.