Exterior Components› Body Panels and Components
GrimmSpeed
GrimmSpeed Wiring Harness for Hella Horns 2018 WRX STI
SKU: G00B 40026
Beginner — under 30 min
Description
This harness utilizes automotive-grade 16ga wire for minimal resistance and maximum volume. It includes heat shrink terminals for a reliable connection and protective wire sleeving for abrasion resistance.
Fitment
Fitment Guaranteed
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Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.
Available on iOS & Android
Specifications
| Brand | GrimmSpeed |
| Part Number | G00B 40026 |
Buy with Confidence
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
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