HKS 51999-AF001 Carbon Shift Knob for 2015-2021 Subaru WRX & WRX STI 6MT

The HKS 51999-AF001 Carbon Shift Knob is a vehicle-specific interior upgrade for compatible Subaru 6-speed manual-transmission applications, including the 2015–2021 Subaru WRX and WRX STI.

HKS combines a carbon-fiber body with a machined aluminum collar and red anodized accent line for a performance-focused appearance that complements the factory Subaru interior. The spherical section measures approximately 47mm in diameter for a compact, purposeful shift-knob design.

Features

• HKS vehicle-specific carbon shift knob
• Designed for compatible Subaru 6-speed manual transmissions
• Carbon-fiber body
• Machined aluminum collar
• Red anodized accent line
• 47mm spherical knob diameter
• Includes 6-speed manual shift-pattern sticker
• Shift pattern features reverse in the lower-right position

Fitment

• 2015–2021 Subaru WRX 6-Speed Manual
• 2015–2021 Subaru WRX STI 6-Speed Manual

HKS also catalogs part number 51999-AF001 for select earlier Subaru 6-speed manual applications. Verify your exact vehicle and transmission configuration before ordering.

Specifications

• Manufacturer: HKS
• Part Number: 51999-AF001
• 
  
• Product Type: Carbon Shift Knob
• Transmission: 6-Speed Manual
• Knob Diameter: 47mm
• Body Material: Carbon Fiber
• Collar Material: Machined Aluminum
• Accent: Red Anodized
• Shift Pattern: 6MT, Reverse Lower Right

Recommended Use

• Subaru WRX and WRX STI interior upgrades
• Performance-oriented street vehicles
• Replacing the factory shift knob
• Drivers seeking an HKS carbon-fiber interior accent

What’s Included

• 1 HKS 51999-AF001 carbon shift knob
• 1 6-speed shift-pattern sticker

Installation

Remove the existing shift knob and install the HKS shift knob according to the appropriate Subaru and HKS installation procedure. Verify transmission compatibility and proper shift-knob installation before driving.