Quick Answer

If you drive a BRZ/FR-S/GT-86, the Billetworkz reverse lockout is a direct fix for factory vibration and knob fitment. Mustang owners get a slimmer collar that finally clears aftermarket knobs, while Focus ST/RS and Fiesta ST drivers need the taller, more complex lockout to match their shifter assembly.

Why the Factory Lockout Is the Real Problem

The factory reverse lockout on each of these cars is designed for stock shift knobs, not aftermarket ones. On the Mustang, the OEM collar is oversized and restrictive, which often blocks aftermarket knobs from seating correctly. The Focus ST/RS and Fiesta ST have a similar issue with a large top diameter that limits knob compatibility.

The BRZ's factory unit is less about size and more about feel—owners report unwanted vibration and wear. That's why a direct replacement like the Billetworkz BRZ lockout makes sense even if you keep the stock knob.

Slim Profile vs. Full Compatibility

All three Billetworkz lockouts share a slim-profile design, but they solve different problems. The Mustang version replaces the bulky OEM collar so you can finally run a Billetworkz shift knob without interference. The Focus ST/RS and Fiesta ST version is also slim, but it has to match the specific shifter geometry of those cars.

On the BRZ, the slim profile is about cleaning up the interior and getting a more solid feel. The anodized finish adds durability and a subtle upgrade to the cabin.

Trade-Offs at a Glance

  • BRZ/FR-S/GT-86: Direct replacement that solves vibration and wear. Best if you want a cleaner interior and a more solid shift feel without changing the shifter geometry. If you already have a Billetworkz knob, check that the lockout color matches your setup.
  • Ford Mustang (2015+): Replaces the oversized OEM collar that blocks aftermarket knobs. Best if you've tried fitting a new knob and it wouldn't seat properly. Verify your Mustang's model year and transmission type before ordering.
  • Focus ST/RS and Fiesta ST: Slim-profile lockout that fixes the restrictive factory top diameter. Best if you want to run a Billetworkz knob on these Ford hatches. Confirm you have the 6-speed manual; the lockout is specific to that transmission.

Product Facts

  • Billetworkz BRZ/FR-S/GT-86 2013-2021 Reverse Lockout (6-Speed): Slim-profile anodized reverse lockout designed as a direct OEM replacement for BRZ/FR-S/GT-86 6-speed models. It fixes factory vibration and wear while improving shift-knob compatibility without changing the shifter feel.

    Billetworkz BRZ/FR-S/GT-86 2013-2021 Reverse Lockout (6-Speed)

    Billetworkz BRZ/FR-S/GT-86 2013-2021 Reverse Lockout (6-Speed)

  • Billetworkz Reverse Lockout - Ford Mustang (2015+): Slim-profile reverse lockout for 2015+ Ford Mustangs that replaces the bulky OEM design and works with all Billetworkz shift knob shapes. It removes the biggest obstacle to fitting an aftermarket knob on your Mustang, so you can upgrade the interior without fighting the collar.

    Billetworkz Reverse Lockout - Ford Mustang (2015+)

    Billetworkz Reverse Lockout - Ford Mustang (2015+)

  • Billetworkz Focus ST/RS and Fiesta ST Reverse Lockout (6-Speed): Sleek, slim-profile upgrade that replaces the bulky factory lockout on Focus ST, Focus RS, and Fiesta ST. It opens up knob compatibility on these Ford models, which the stock collar's large top diameter otherwise restricts.

Which One Fits You?

Best for

  • BRZ/FR-S/GT-86 owners who want a direct OEM replacement with better feel and less vibration.
  • Mustang and Focus ST/RS/Fiesta ST owners who want to fit a Billetworkz shift knob and need a slimmer collar.

Not for

  • Drivers who are happy with the factory lockout and don't plan to change their shift knob.
  • Anyone with a different vehicle model—these lockouts are vehicle-specific.