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The GrimmSpeed Hella horn wiring harness is made for 2015+ Subaru WRX and STI models to facilitate installation of Hella horns. This harness matches the vehicle electrical layout for 2015 and later WRX/STI applications, providing a tidy, application-specific way to connect Hella horn units without relying on generic wiring adaptations.
GrimmSpeed 2015+ WRX/STI Hella Horn Wiring Harness
