DeatschWerks 440cc Fuel Injectors – Set of 4 (1990-2005 Mazda Miata NA/NB)
The DeatschWerks 440cc Fuel Injector Set is the perfect upgrade for 1990-2005 Mazda Miata (NA and NB) owners looking for reliable, high-flow fuel delivery.
This matched set of four 440cc/min injectors is ideal for mildly to moderately modified Miata engines, including turbocharged, supercharged, and high-compression builds.
Built using quality OEM cores and precision flow-matched to within 2% variation, these injectors deliver consistent performance, excellent atomization, and smooth drivability.
Featuring USCAR connectors for modern reliability, they are a direct plug-and-play upgrade for both 1.6L and 1.8L Miata engines.
Key Features
- 440cc/min Flow Rate – Ideal for up to approximately 250-280 wheel horsepower on pump gas
- Matched Set of 4 – Flow-tested and balanced to within 2% for smooth, consistent performance
- USCAR Connector – Modern, reliable connector style used in many performance applications
- Direct Fit for NA & NB Miata – 1990-1997 (NA) and 1998-2005 (NB) chassis
- Excellent Atomization – Provides clean combustion and efficient fuel delivery
- High-Quality Construction – Built from premium OEM cores with precision manufacturing
| Spec | Detail |
|---|---|
| Part Number | 18U-05-0440-4 |
| Brand | DeatschWerks |
| Type | Fuel Injector Set (4 Injectors) |
| Flow Rate | 440 cc/min @ 43.5 psi (3 bar) |
| Connector Type | USCAR |
| Number of Injectors | 4 (Complete Set) |
| Compatibility | 1.6L & 1.8L Mazda Miata (NA/NB) |
| Country of Origin | United States |
| Warranty | DeatschWerks Limited Warranty |
Whats Included
- Set of 4 DeatschWerks 440cc Fuel Injectors
- Individual flow report for each injector
- Installation instructions
Product Notes
- Designed for 1990-2005 Mazda Miata (NA 1990-1997 & NB 1998-2005)
- Excellent choice for turbo, supercharged, or high-compression builds
- Professional installation and proper fuel system tuning recommended
Installation Notes
- Direct plug-and-play replacement for factory injectors
- Estimated time: 1–2 hours
- Professional installation and ECU tuning recommended for optimal performance
This Part Fits
| Year Range | Make | Model | Engine | Notes |
|---|---|---|---|---|
| 1990-1997 | Mazda | Miata (NA) | 1.6L & 1.8L | All Trims (Base, LE, SE, STO, M Edition, 10th Anniversary) |
| 1998-2005 | Mazda | Miata (NB) | 1.8L | All Trims (Base, LS, SE, Shinsen, Mazdaspeed) |
Why Choose DeatschWerks Injectors?
- Industry leader in high-flow, performance fuel injectors
- Every injector is flow-tested and matched for superior consistency
- Built from quality OEM cores with modern USCAR connectors
- Trusted by Miata enthusiasts and tuners worldwide
Frequently Asked Questions
-
Q: Will these fit my 1995 Miata?
A: Yes, they fit all 1990-1997 NA Miata models (both 1.6L and 1.8L). -
Q: Are these suitable for a turbo Miata?
A: Yes, 440cc injectors are a popular choice for mildly to moderately boosted Miata engines. -
Q: Do I need to tune my ECU?
A: Yes, professional tuning is strongly recommended for best performance and reliability. -
Q: Are these injectors flow-matched?
A: Yes, each set is matched to within 2% flow variation and includes a flow report.
Shipping & Handling
- Method: Ground UPS or FedEx
- Availability: In stock – ships same or next business day
- Packaging: Secure DeatschWerks retail packaging
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