DeatschWerks 800cc Injectors

1990–2005 Mazda Miata (NA/NB) 1.6L & 1.8L Engines

Part #: 18U-05-0800-4

Overview

The DeatschWerks 800cc Injectors are high-performance fuel injectors designed specifically for Mazda Miata models from 1990 to 2005, covering both NA and NB generations. Whether you're building a street-driven Miata, a track-ready machine, or a boosted setup, these injectors provide the precise fuel delivery needed to support increased power and performance.

Engineered for enthusiasts who want reliable, consistent fuel delivery, these injectors help optimize your vehicle's fueling system, ensuring smooth throttle response and improved overall engine efficiency. They are an excellent choice for those upgrading their Miata for forced induction, high-revving builds, or simply seeking better fuel atomization and throttle control.

Key Features

DeatschWerks is renowned for producing high-quality, reliable fuel injectors that deliver excellent performance and durability. The 800cc injectors feature a high-flow capacity suitable for modified engines, supporting increased horsepower and torque. Constructed with precision-machined components and high-quality materials, these injectors ensure consistent spray patterns and reliable operation over time.

• Flow rate of 800cc/min, ideal for moderate to heavily modified Miatas
• High-impedance design for compatibility with most fuel management systems
• Electrically balanced for precise fuel metering and stable idle
• Constructed with durable, corrosion-resistant materials for long-lasting performance
• Compatible with both stock and aftermarket fuel rails
• Designed for plug-and-play installation with no modifications required
• Supports increased fueling needs for forced induction or high-performance setups
• Optimized spray pattern for efficient fuel atomization and combustion
• Manufactured and tested to meet strict quality standards for reliability

Filter Options

These injectors are designed as direct replacements and do not include filters or additional media options. For optimal performance, ensure your fuel system includes appropriate filtration to prevent debris from clogging the injectors.

Construction & Design

The DeatschWerks 800cc injectors feature a high-precision, high-flow solenoid and a durable, corrosion-resistant body. Their compact design allows for easy installation in the factory fuel rail without modifications. The injectors are built with a focus on consistent spray patterns and electrical stability, ensuring smooth operation across a wide range of driving conditions. The high-impedance design reduces the risk of driver circuit overload and makes them compatible with most aftermarket engine management systems.

Performance & Sound

With a flow rate of 800cc/min, these injectors provide a significant upgrade over stock units, supporting increased fuel delivery for boosted or high-performance applications. While they do not produce audible sounds beyond typical injector operation, their precise fueling helps improve throttle response, engine smoothness, and overall power output. Expect better fueling accuracy and more consistent performance during spirited driving or track use.

Installation & Fitment

The DeatschWerks 800cc injectors are designed as direct replacements for the factory injectors in Mazda Miata NA and NB models from 1990 to 2005. Installation is straightforward, requiring only basic hand tools. No cutting, drilling, or tuning is typically necessary for stock or mildly modified setups, but tuning is recommended when used with forced induction or significantly altered fueling systems to optimize performance and ensure proper air-fuel ratios.

• Plug-and-play installation in OEM fuel rails
• No modifications required for stock or lightly modified engines
• Recommended to tune your ECU or engine management system for optimal results

What's Included

• Set of four DeatschWerks 800cc fuel injectors
• Installation instructions (if provided)

Ideal For

• Mazda Miata owners seeking increased fueling capacity for boosted or high-performance builds
• Enthusiasts aiming for improved throttle response and engine efficiency
• Track day and spirited driving enthusiasts looking for reliable, high-flow injectors

Emissions Note

These injectors are designed for off-road or racing use only and may not be legal for street use in all jurisdictions. Please verify local regulations before installation.