HKS 51999-AT002 Carbon Fiber Shift Knob GR Corolla GR Yaris M12x1.25 6MT 54mm

Vehicle Fitment

• Toyota GR Corolla (NRE210H / GZEA14H), G16E-GTS, 6-Speed Manual Transmission
• Toyota GR Yaris (GXPA16), G16E-GTS, 6-Speed Manual Transmission

Fitment Notes

• For 6-speed manual (6MT) transmission models only - this knob is not applicable to automatic transmission variants
• Thread specification is M12 x P1.25 - this matches the OEM shift lever thread on the GR Corolla and GR Yaris; verify your vehicle's thread pitch before ordering if any aftermarket shift lever or adapter has been installed
• Overall knob length is 54mm - slightly more compact than some OEM knobs, which affects the hand position and feel at the top of the shift throw; consider this if you are particular about shift lever height relative to the center console
• Diameter is intentionally reduced compared to OEM - the smaller diameter allows a more positive grip with less hand fatigue during repetitive shifting; those who prefer a larger grip should compare diameter measurements before ordering
• An HKS 6-speed shift pattern sticker is included - apply to the top of the knob or elsewhere as preferred; the shift pattern graphic is specific to the 6-speed layout of the GR Corolla and GR Yaris

Features

• Real carbon fiber construction on the knob body - the carbon fiber weave pattern is structural, not a skin or wrap over a plastic core; carbon fiber provides a high strength-to-weight ratio that keeps knob mass low for crisp tactile feedback during rapid shifts, while the woven surface texture provides grip without requiring rubber or leather covering
• Machined aluminum accents complement the carbon fiber - the combination of woven carbon fiber and machined aluminum billet color creates the clean, functional cockpit aesthetic associated with motorsport applications, consistent with the performance character of the G16E-GTS platform
• Reduced diameter versus OEM shift knob provides a more precise grip - a smaller diameter knob reduces the lever arm between the hand and the shift shaft center, requiring less wrist movement per shift and giving the driver more precise control over shift direction, particularly during quick gear changes
• Vehicle-optimized design - HKS has designed this knob specifically for the GR Corolla and GR Yaris rather than using a generic universal knob; the 54mm length, M12xP1.25 thread, and diameter are calibrated to suit the shift lever geometry and center console ergonomics of these specific vehicles
• Made in Japan - consistent with HKS's interior accessory line, maintaining quality standards appropriate to the price point and the vehicles these knobs are designed for

Specifications

• Part Number: 51999-AT002
• HKS Product Name: CARBON SHIFT KNOB GXPA16/GZEA14H
• UPC: 4957266826256
• Compatible Vehicles: Toyota GR Corolla (NRE210H/GZEA14H), Toyota GR Yaris (GXPA16)
• Compatible Engine: G16E-GTS
• Transmission: 6-speed manual (6MT) only
• Thread: M12 x P1.25
• Overall Length: 54mm
• Body Material: Real carbon fiber
• Accent Material: Machined aluminum
• Diameter: Reduced vs. OEM (more compact grip)
• Made in Japan

Included Components

• 1x HKS carbon fiber shift knob (M12 x P1.25, 54mm)
• HKS 6-speed shift pattern sticker

Product Description

The HKS 51999-AT002 is the Carbon Shift Knob for the Toyota GR Corolla (NRE210H/GZEA14H) and Toyota GR Yaris (GXPA16), both equipped with the G16E-GTS engine and 6-speed manual transmission. It is a vehicle-specific design - the 54mm overall length, M12xP1.25 thread, and reduced diameter are calibrated to the shift lever geometry and cockpit ergonomics of these particular models rather than adapted from a universal design. It fits directly onto the OEM shift lever without adapters.

The knob body is real carbon fiber - not a decorative wrap or carbon-look vinyl over a plastic core - combined with machined aluminum accents. The material combination produces a motorsport-appropriate appearance that suits the aggressive character of the GR Corolla and GR Yaris interiors while keeping knob weight low for responsive tactile feedback. The reduced diameter versus OEM allows a more precise, positive grip during quick shifts and reduces the wrist movement required per shift direction change. A 6-speed HKS shift pattern sticker is included, sized for application to the knob's top face or surrounding area. Made in Japan.