Koswork Rear Stabilizer Bar 1.2 – Optima (KOS04305-R1.2)

The Koswork Rear Stabilizer Bar 1.2 is a practical suspension tuning option for the Optima Series, identified by part number KOS04305-R1.2. A rear stabilizer (sway) bar helps reduce body roll and refine balance, supporting more consistent cornering and improved stability when grip levels change.

Use this 1.2 spec rear bar to fine-tune handling feel to track conditions. Adjusting stabilizer rates can help manage oversteer/understeer balance and keep the rear of the car flatter through quick transitions.

Suggested Use and Benefits

• Reduce rear body roll for a more planted feel
• Balance front-to-rear grip for predictable handling
• Aid stability through chicanes and high-speed sweepers
• Support repeatable lap times on varying surfaces

Suggested Compatibility

Designed for the Optima Series; suggested compatibility applies to vehicles in that range where a rear stabilizer bar is supported. Refer to your vehicle manual to confirm suitability.