HKS 555cc Injectors Kit : SR & KA

HKS 550cc injectors are direct replacement for the factory fuel rail, even the injector harness plugs right in. With any kind of sports turbo upgrade on the SR20 or KA, this is the minimum injector upgrade size that we recommend. Running larger injectors can help to delivery more fuel to the motor when needed under higher HP applications. Even for low HP applications, injectors can be tuned to run lower duty cycle and less chance for injector failure which results from pushing the injector duty cycles too high.

* Injector o-rings are not included.

The 555's are good for 300rwhp application on pump gas, and good up to 400rwhp on VP C-16 118 leaded octane race gas. Anything over 400rwhp we recommend Tomei 740cc injectors.

** Injector lag time: 0.71 msec