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| SKU | GRMGRM040026 |
| MPN | GRM040026 |
| GTIN | 69787726 |
| Certifications | None |
Experience a simple and clean upgrade for your 2015 and newer WRX and STI models with the GrimmSpeed Horn Wiring Harness. Designed specifically for Hella horns, this harness streamlines the installation process by providing a plug-and-play solution that avoids any complicated splicing or rewiring.
Crafted to connect effortlessly with the vehicle's existing systems, the GrimmSpeed wiring harness ensures reliable horn function while maintaining factory safety standards. Its durable construction helps protect against corrosion and wear, giving you peace of mind that your horn setup will stand up to daily use and various weather conditions.
This harness is an ideal accessory for enthusiasts aiming to boost their car's auditory presence with quality aftermarket horns without the headache of a complex installation. Compatible with a range of popular Hella horn models, it fits perfectly under the hood, preserving the clean look of your engine bay.
Whether you're upgrading for better sound or adding a custom touch, the GrimmSpeed Horn Wiring Harness offers an easy, dependable, and neat solution. Trust the performance and expertise behind the GrimmSpeed name to deliver high-quality components that enhance both style and function.
Crafted to connect effortlessly with the vehicle's existing systems, the GrimmSpeed wiring harness ensures reliable horn function while maintaining factory safety standards. Its durable construction helps protect against corrosion and wear, giving you peace of mind that your horn setup will stand up to daily use and various weather conditions.
This harness is an ideal accessory for enthusiasts aiming to boost their car's auditory presence with quality aftermarket horns without the headache of a complex installation. Compatible with a range of popular Hella horn models, it fits perfectly under the hood, preserving the clean look of your engine bay.
Whether you're upgrading for better sound or adding a custom touch, the GrimmSpeed Horn Wiring Harness offers an easy, dependable, and neat solution. Trust the performance and expertise behind the GrimmSpeed name to deliver high-quality components that enhance both style and function.
Netherlands owned and operated
We want to deliver parts fast, efficiently, and with ease. Our mission is to continue to provide just that. To provide large inventory and efficient logistics while maintaining great service. As well as a community with like-minded auto enthusiasts that share the same passion as we do.

















