Mazda MX-5 Miata NB/NBFL Cold Air Intake – OEM & 64mm throttle body, 1998–2005

🚀 Mazda MX-5 NB / NBFL Cold Air Intake

A compact, lightweight intake system engineered specifically for the Mazda MX-5 NB and NBFL.

Unlike universal silicone elbow conversions, this intake integrates the MAF sensor, intake air temperature sensor and PCV connection into one complete modular system.

✅ Key Features

• Extremely short and direct intake path
• Designed for sharp throttle response
• Positions the air filter away from the exhaust side of the engine
• Proper mounting for the original intake air temperature sensor
• Integrated modular PCV connection
• Flexible TPU couplers absorb vibration and engine movement
• Compatible with the original and selected 64 mm throttle bodies
• Available with or without a matched air filter
• Plug-and-play and fully reversible installation
• No ECU tuning required
• Designed and manufactured in the Czech Republic

🛠️ Engineered Specifically for the MX-5

The Tuning3D intake was developed as a properly engineered alternative to universal short intake kits and DIY silicone elbow conversions.

A short and direct intake path helps reduce unnecessary intake volume and provides fast throttle response. However, a simple silicone elbow does not properly solve sensor mounting, PCV connection, filter clearance, engine movement or long-term durability.

This intake combines all required connections into one compact system designed specifically around the limited space inside the Mazda MX-5 NB and NBFL engine bay.

The main ASA intake elbow provides a smooth airflow path between the MAF sensor and throttle body, while the flexible TPU couplers absorb vibration, engine movement and clamp loads.

The couplers also allow the intake to be installed and removed repeatedly without placing unnecessary stress on the rigid intake body.

🌡️ Proper IAT Sensor Mounting

The original intake air temperature sensor is retained using a dedicated sealed mounting point.

A silicone O-ring provides the seal, while a high-strength PAHT-CF retaining nut secures the sensor in position.

The sensor is positioned directly in the incoming airflow while creating minimal obstruction inside the intake tract.

💨 Modular PCV Connection

The intake includes a modular M16×1.5 PCV port.

The port can be configured using:

• The included PCV hose fitting
• The included sealing plug
• Compatible aftermarket fittings

The internal opening has been redesigned so that only a small passage enters the main intake tract, helping reduce unnecessary airflow disturbance around the PCV connection.

The supplied plug may also be modified for certain custom sensor installations. Any modification is performed entirely at the installer’s own responsibility.

🔩 Durable Multi-Material Construction

Each component is manufactured from a material selected for its specific function.

• ASA – main intake elbow
• TPU – flexible MAF and throttle body couplers
• PAHT-CF – IAT retaining nut, PCV fitting and sealing plug
• Silicone – PCV hose and sensor O-ring
• Stainless steel – four main coupler clamps
• Steel – smaller PCV hose clamps

The main intake body is printed in an orientation optimized for mechanical strength and long-term durability.

The flexible TPU couplers significantly reduce the mechanical stress transferred to the rigid intake body compared with directly clamping onto a printed component.

⚙️ Available Configurations

The intake can be ordered in several configurations.

Original Throttle Body

Includes the TPU coupler required for the original Mazda throttle body.

Original + 64 mm Throttle Body

Includes the original throttle body coupler plus an additional coupler for selected 64 mm aftermarket throttle bodies, including commonly used Skunk2-style and similar designs.

Intake Without Filter

Choose this option if you already own a compatible air filter.

Intake With Ramair Filter

Complete package with a matched Ramair performance air filter.

Intake With GReddy Filter

Complete package with a premium GReddy air filter.

Filter compatibility depends on the vehicle headlight type and whether the optional Velocity Stack is installed. Please read the compatibility information below before ordering.

🔧 Filter Compatibility

The Mazda MX-5 NB and NBFL use different headlight shapes, which affects the available space for the air filter.

Configuration 1: Filter Mounted Directly to the MAF

When mounting the filter directly onto the MAF sensor, use a filter with a 70 mm inlet.

Pre-Facelift MX-5 NB / NB1 — 1998–2000

• Recommended maximum filter length: approximately 140–145 mm
• A 150 mm filter may fit very tightly but is not recommended for guaranteed clearance
• Always verify the actual filter dimensions before ordering

Facelift MX-5 NBFL — 2001–2005

• Larger headlight clearance
• Filters up to approximately 160 mm can normally be used
• Always verify the actual filter dimensions before ordering

Configuration 2: Optional Velocity Stack

The optional Tuning3D Velocity Stack improves the airflow entry into the MAF sensor by creating a smoother transition from the filter into the intake.

It can also provide a more aggressive intake sound and helps use a larger filter inlet area.

The Velocity Stack requires a filter with an approximately 152 mm mounting flange.

Available here:

Velocity Stack Upgrade for Cold Air Intake

Pre-Facelift MX-5 NB / NB1 — 1998–2000

Use:

Ramair PR-CC-193-150

The larger PR-CC-194-150 does not provide sufficient clearance with the original NB1 headlights.

Facelift MX-5 NBFL — 2001–2005

Use:

Ramair PR-CC-194-150

This also applies to cars fitted with NBFL-style aftermarket headlights where sufficient clearance is available.

The Velocity Stack itself is compatible with both NB and NBFL models. The correct filter must be selected according to the installed headlight type.

📦 What Is Included

• 1× ASA intake elbow
• 1× TPU MAF coupler
• 1× TPU original throttle body coupler
• 1× additional 64 mm throttle body coupler when selected
• 4× stainless steel coupler clamps
• 1× PAHT-CF PCV fitting
• 1× PAHT-CF PCV sealing plug
• 1× silicone PCV hose
• 2× PCV hose clamps
• 1× PAHT-CF intake temperature sensor retaining nut
• 1× silicone sensor O-ring
• Selected air filter when ordered

The Velocity Stack is a separate optional product unless explicitly included in the selected configuration.

📘 Installation

The intake is designed as a fully reversible plug-and-play upgrade.

• No cutting
• No drilling
• No permanent modification of original vehicle parts
• No ECU tuning required

The original intake system can be reinstalled later if required.

Do not overtighten the clamps or threaded components. Tighten only enough to create a secure connection and reliable seal.

🏁 Development and Performance

The previous-generation Tuning3D intake was dyno tested on a stock Mazda MX-5 NB 1.8 BP4W.

The test recorded a peak gain of 3.8 wheel horsepower, approximately 2.6%, with no measured power loss elsewhere in the tested RPM range.

The V3 intake has not yet been separately dyno tested. It uses the same short-intake development experience but introduces a redesigned modular construction, different materials and improved durability.

No specific power increase is therefore claimed for the V3 until dedicated testing has been completed.

❓ Frequently Asked Questions

Does the intake require ECU tuning?

No. ECU tuning is not required for installation.

Does it fit the original throttle body?

Yes. The standard configuration includes the required original throttle body coupler.

Does it fit a 64 mm throttle body?

The optional configuration includes an additional TPU coupler for selected 64 mm throttle bodies. Compatibility may vary between individual aftermarket manufacturers.

Can I use my own filter?

Yes. Select the no filter configuration and use a compatible filter based on the dimensions listed above.

Is the Velocity Stack required?

No. The air filter can be mounted directly onto the MAF sensor. The Velocity Stack is an optional airflow and sound upgrade.

Does the intake retain the original IAT sensor?

Yes. The original sensor is installed in a dedicated sealed mounting point.

Can I remove the PCV connection?

Yes. The included sealing plug can be used when the PCV connection is not required.

⚠️ Emissions, Road Use and Liability Disclaimer

This product is a non-homologated aftermarket component intended primarily for off-road, motorsport or track use.

It may not comply with road-use, emissions, noise, technical inspection or vehicle modification regulations in your country.

The customer is solely responsible for checking all applicable local laws and regulations before purchasing, installing or using the product.

The manufacturer and seller do not guarantee that the product will pass MOT, TÜV, STK, emissions testing, roadworthiness inspection or any other technical inspection.

Installation and use are performed entirely at the customer’s own risk.

The manufacturer and seller accept no responsibility or liability for:

• Vehicle or engine damage
• Incorrect installation
• Incorrect tightening or assembly
• Use with incompatible components
• Modified or drilled components
• Legal or emissions compliance
• Failed vehicle inspections
• Loss of warranty
• Injury, property damage or consequential losses

Installation should be performed by a competent person. All components, clamps and connections must be inspected regularly and retightened or replaced if required.

By purchasing and installing this product, the customer acknowledges that it is an aftermarket, non-homologated component and accepts full responsibility for its installation and use.

Manufacturer / Výrobce (GPSR):
Alexandr Vránek
Černvír 8, 592 62 Nedvědice, Czech Republic
tuning3d@seznam.cz