JDMuscle [15-25 WRX, 15-21 STI] V4/V5 F1 Light Plug and Play Harness

F1 Light Plug & Play Signal Harness

Install your F1 light — or any accessory requiring a signal line from your tail lights — without cutting or splicing into the factory wiring. Compatible with the V4 and V5 JDMuscle F1 Light.

Features

• Plug & play installation — no wire splicing required
• Taps directly into factory tail light connector
• Compatible with JDMuscle V4 & V5 F1 Lights
• Clean, OEM-style integration

Fitment

• 2015–2025 Subaru WRX (VA & VB)
• 2015–2021 Subaru STI (VA)

Installation

• Difficulty: ★☆☆☆☆
• Time: 10–15 min