This is the Grimmspeed wiring harnees for those of you planning on installing Hella Horns in the 2002-2014 WRX, or the 2004-2014 STI. This wiring harness provides a clean and secure means of installation especially if you wanted to install the Hella Horns in a custom location.
And nobody likes looking at a rat’s nest of wires in the engine bay. If you’re installing the Hella Horns, keep things neat, and tidy with the Grimmspeed wiring harness.
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