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Consistent Fuel Delivery for Built NC Miatas
Factory injectors on the NC Miata are sized for stock power levels and quickly become a bottleneck once a turbo, supercharger, or larger throttle body enters the picture. The DWK18U-00-0550-4 set swaps in a matched quartet of DeatschWerks 550cc injectors built on the versatile 60mm EV14 body, giving tuners the extra flow needed to safely support higher boost and horsepower goals.
Key Features
- Set of 4 fuel injectors rated at 550cc per minute
- Bosch EV14 60mm long body design for broad engine bay compatibility
- 100 percent new Denso manufactured internals, not remanufactured
- Flow balanced and matched within 1 to 2 percent across the set
- High impedance coil design matches OEM ECU wiring without a resistor box
- Center axis conical spray pattern for improved atomization and idle quality
Fitment Table
| Year Range | Make | Model |
|---|---|---|
| 2006-2015 | Mazda | MX-5 Miata |
Specifications
| Detail | Value |
|---|---|
| Part Number | DWK18U-00-0550-4 |
| Brand | DeatschWerks |
| Flow Rate | 550cc per minute |
| Body Style | Bosch EV14, 60mm long |
| Impedance | High impedance |
| Quantity | Set of 4 |
| UPC | N/A |
| Warranty | DeatschWerks Limited Warranty |
What's Included
- 4 DeatschWerks 550cc EV14 fuel injectors
- Injector O-rings
- DeatschWerks flow match report
About DeatschWerks
DeatschWerks designs and manufactures fuel system components for the automotive aftermarket from its facility in Oklahoma City. Since 2004 the brand has built a reputation for precisely flow matched injectors, high output fuel pumps, and complete fuel system solutions covering sport compact, modern muscle, and Euro platforms.
FAQ
What is the DWK18U-00-0550-4?The DWK18U-00-0550-4 is a set of four DeatschWerks 550cc per minute fuel injectors built on the Bosch EV14 60mm long body, sized for 2006-2015 Mazda MX-5 Miata NC applications running upgraded power levels.
How much power can these injectors support?550cc injectors typically support builds well beyond stock naturally aspirated output and are commonly chosen for turbocharged or supercharged NC Miata setups.
Are these injectors flow matched?Yes, every set is flow tested and balanced to within 1 to 2 percent variance before shipping.
Will these work with my factory ECU?These are high impedance injectors designed to work with OEM style ECU wiring without needing a resistor box, though tuning is required for proper fueling.
Do these injectors require a tune?Yes, installing larger injectors requires updating your fuel tables through a standalone or tunable ECU to avoid running excessively rich or lean.
What spray pattern do these injectors use?They use a center axis conical spray pattern for improved atomization and smoother idle compared to older single hole designs.
Are these new or remanufactured injectors?These are 100 percent new, Denso manufactured injectors, not remanufactured or reconditioned units.
Do I need an adapter to install these on my Miata?The 60mm EV14 body is sized to match common stock injector heights on many applications, but always verify clearance and fuel rail fitment before installation.
Install Instructions
- Relieve fuel system pressure before beginning work
- Disconnect the negative battery terminal
- Remove the fuel rail with injectors attached
- Remove factory injectors from the fuel rail and discard old O-rings
- Install new O-rings on the DeatschWerks injectors and lubricate lightly
- Seat the new injectors into the fuel rail and reinstall the rail assembly
- Reconnect the negative battery terminal and update injector data in your ECU
- Check for fuel leaks before starting the engine
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