KARTBOY KNUCKLEBALL BLACK ALUMINUM SHIFT KNOB - 6MT - 04-21 STI, 15-21 WRX, 22+ WRX, 07-09 LEGACY GT SPEC.B, 13-21 BRZ, 22+ BRZ
Check Vehicle Fitment Confirm compatibility before ordering
2004–2007
Subaru
STI
Fitment Note
For 6-speed manual shift levers with M12×1.25 threads only.
2008–2014
Subaru
STI
Fitment Note
For 6-speed manual shift levers with M12×1.25 threads only.
2015–2021
Subaru
STI
Fitment Note
For 6-speed manual shift levers with M12×1.25 threads only.
2015–2021
Subaru
WRX
Fitment Note
For 6-speed manual shift levers with M12×1.25 threads only.
2022–2026
Subaru
WRX
Fitment Note
For 6-speed manual shift levers with M12×1.25 threads only.
2007–2009
Subaru
LEGACY
Transmission
6MT
Trim
GT spec.B
Fitment Note
Legacy GT spec.B trim only; 6-speed manual transmission.
2013–2021
Subaru
BRZ
Transmission
6MT
Fitment Note
6-speed manual transmission only.
2022–2026
Subaru
BRZ
Transmission
6MT
Fitment Note
6-speed manual transmission only.
Knuckleball (6spd) – You’re using your stock shift knob on your radical Kartboy shifter? Ditch that sticky rubber and replace it with a Knuckleball. 5 ounces of CNC’d 6061 aluminum that feels right in your hand, and gives just enough weight to make that shifter go from regular to extra tasty crispy. Cup the ball. You know you want to.
Choose options