GrimmSpeed Brotie Mounting Bracket and Wiring Harness Bundle (2015–2021 WRX / STI, 2013–2020 FR-S / BRZ / 86)

Here’s the cleanest way to mount and wire Hella horns on your late-model Subaru or 86 platform. This GrimmSpeed bundle combines our proven BroTie mounting bracket with a vehicle-specific plug-and-play wiring harness, giving you a rock-solid mount and an easy, factory-style hookup. No cutting, no guesswork—just a neat install that looks sharp and works flawlessly.

We’ve engineered these components with the same attention to detail we put into every GrimmSpeed part: laser-cut steel, durable black powdercoat, abrasion-resistant sleeving, and heat-shrink terminals. The bracket provides a secure, adjustable mount behind your grille, while the harness keeps wiring tidy and reliable. Together, they make getting that aggressive Hella blast simple, safe, and repeatable.

Quick Specs

• Bracket: 1/8" laser-cut steel, black powdercoat

• Adjustability: Slotted mount points for horn positioning and aim

• Harness: Vehicle-specific pre-terminated wiring with factory-style connectors

• Wire gauge: Proper thickness to support Hella Supertone/Sharptone horns

• Terminations: Heat-shrink protected connections

Fitments (Bundle)

• Subaru WRX: 2015–2021

• Subaru STI: 2015–2021

• Scion FR-S: 2013–2016

• Subaru BRZ: 2013–2020

• Toyota 86: 2017–2020

• Note: The BroTie bracket alone fits more Subaru platforms, but this bundle is specifically matched with the harness above to cover WRX/STI (2015–21) and FR-S/BRZ/86 (2013–20).

What’s in the Box

• (1) GrimmSpeed BroTie Hella Horn Mounting Bracket

• (1) Vehicle-specific plug-and-play wiring harness (15–21 WRX/STI, 13–20 FR-S/BRZ/86)

• (1) Hardware pack for installation

Horns not included. Pair with your choice of Hella Supertone or Sharptone horns.