Description

Steering Switch Case Pro-20S
Weighing just 700g, it offers greater freedom in steering control.
Drawing on expertise gained from designing units for other vehicle models and incorporating concepts from competition-spec engineering, we have developed this new Steering Switch Case specifically for the GR Yaris (Gen 2) and GR Corolla.
Its hybrid construction—combining dry carbon and ABS resin—achieves an ideal balance of rigidity and lightness.
The 700g unit weight minimizes steering inertia, significantly improving responsiveness while driving.
The combined weight of the steering wheel, this product, and the RAPFIX2 (one side) is approximately 1.8kg—a reduction of about 800g compared to the stock steering setup (approx. 2.6kg).
This difference translates into a tangible advantage during cornering and rapid directional changes.

【Key Features】
• Lightweight Design: Unit weighs 700g; reduces total steering system weight by approximately 800g.
• Materials: Fuses the high rigidity of dry carbon with the design flexibility of ABS resin.
• Optimized Switch Layout: Uses rocker-style paddle switches in certain areas to accommodate various steering wheel shapes.
• GR-DAT Compatible: Paddle levers are selectable; if chosen, they come pre-installed.
• Pro Model Exclusive: Features backlighting to ensure switch visibility at night or in dark environments.
• RAPFIX2/GTC Compatibility: Can be combined with high-performance quick-release systems and tilt mechanisms.

【Compatible Model Years】
GR Yaris
April 2024 onwards (Facelift/Evolution model)
GR Corolla: All model years

【Transmission Details】
Depending on your transmission type, please select the appropriate paddle lever option at the bottom of the purchase page.
For MT (Manual Transmission), select “None.” For DAT (Direct Automatic Transmission), select either the carbon or aluminum paddle lever.
Please ensure a selection is made.
For DAT models, you may select “None,” but this means paddle-based gear shifting will not be available.
If “None” is selected, paddle levers can be purchased separately later, though this will require additional installation work.

【Delivery Time】
Currently available for shipment in approximately 5 weeks. [Materials]
Front: Dry carbon | Back: ABS

[Options ]

Paddle unit (Carbon) 

Paddle unit (Aluminium)

[Confirmed Compatible Steering Wheels]
-Confirmed as of December 1, 2022. This list will be updated as new models are confirmed.

momo JET 32
momo M08
OMP WRC
OMP Targa 33
OMP VOLANTE 320*
*Requires a separate 5mm spacer.

[Note] A separate steering wheel boss (hub adapter) is required for installation.

[About Bosses and Rapfix II]
The Steering Switch Case (hereinafter “SSC”) is compatible with Works Bell bosses and the Rapfix II.
Installation sequences are as follows:

■Installation Sequence
Pattern 1
Vehicle → Boss → SSC → SW
Pattern 2
Vehicle → Short Boss → RAPFIX II → SSC → SW
Pattern 3
Vehicle → Short Boss → SSC → RAPFIX II → SW

*SSC (Steering Switch Case)
*SW (Steering Wheel)
*Pattern 2 requires a 13-pin insulator/flipper.
*Pattern 3 requires a 15mm spacer between the short boss and the SSC.

[About the 13-Pin Insulator]
When securing the unit using the Rapfix II, this product is installed between the steering wheel and the Rapfix (see Pattern 2 above).

In this case, a pre-wired 13-pin insulator is required.
Standard Works Bell 13-pin insulators are not pre-wired. We sell pre-wired 13-pin insulators, so please feel free to contact us.

[About GTC]
When installing with the Works Bell RAPFIX GTC, installation is not possible unless the wiring connecting the SSC and the roll connector is routed outside the product.
If you select the GTC option when ordering, the necessary additional parts will be included. Dedicated wiring (extension cord): ¥4,000
15mm spacer: ¥2,900

[Installation with a MOMO steering wheel]
When installing a MOMO-compatible horn button, it may be necessary to modify the horn ring included with the Rapfix II by filing or grinding it to allow the wiring to pass through.
Please exercise caution during assembly to avoid damaging the wiring for the steering wheel switch housing.