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Given the large failure rate of injectors, these will not only reduce failure rate but increase flow., We don't see these as a must, but no question a great upgrade if pushing the engine and looking for a preventative modification to help your engine strong for years to come.
A0 can be used without tuning (5%)
A1 may require tuning after installation (15%)
Selection guide. If your not planning on WMI for your car A1 with tuning is the better option. However A0 out perform OEM by a mile, not only flow but response.
Hardware package includes clips and seals.
We have tested and logged these injectors to perform about 10-15% better, we measured injector duty cycle and fuel trims at idle, both were reduced by about 10-15%. We have also seen newer Elantra N models hit fuel limits far earlier than other Elantra N's of the same year with same ECU calibration ID. 1 customer replaced his injectors and the issue went away, we then suggested it to 2 others whom had the same issues, both customers had the problem go away on these injectors. Since then we have over a dozen customers whom suffer from fuel cuts on Stage 1 tunes in Elantra N's that these cure, and allow not only stage 1 but stage 2 tunes to perform perfectly. We do not believe the upgrade is what helped the fuel cut, but rather faulty injectors from factory, when demand goes up, some injectors seem have to issue. However Injectors on the Elantra N are fairly common issue.
Price for set of 4
OEM Hyundai upgrade fuel injectors for N Series motors see 10% more flow over OEM. We have logged the injectors and fuel system, with these injectors the ecu is pulling 10-13% duty cycle to maintain the same AFR. Meaning 10-13% more flow. These injectors are a 100% upgrade over OEM N Series Injectors.