Just Engineering FRS BRZ GT86 GR86 Adjustable Traction Arms

Just Engineering Adjustable Traction Arms for FRS / BRZ / GT86 / GR86

Take control of your rear suspension geometry with the Just Engineering Adjustable Traction Arms. Designed with a proven rally-inspired approach, these arms are engineered to transform how your chassis handles under load. By refining the suspension's pivot points and geometry, Just Engineering provides a solution that significantly improves rear-end predictability and traction.

This package focuses on optimizing the anti-squat characteristics of the ZN6/ZC6 and ZN8/ZD8 platforms. By lowering the subframe traction arm connection by 50mm (2”), the geometry moves toward a pro-squat setup. Combined with an increased arm length to linearize the toe gain curve, these arms ensure your car remains stable and less "snappy" during hard acceleration and corner exit.

Key Features

• Rally-Proven Construction: Built using swedge tubes with rolled threads for superior fatigue stress resistance in demanding conditions.
• Premium Hardware: Features chromoly double adjusters and PTFE-lined rod ends for maximum longevity and precision.
• Optimized Geometry: Lowers the subframe connection by 50mm (2”) using high-strength steel to reduce anti-squat.
• Linear Toe Curve: Extended arm length reduces the toe gain curve, making rear-end behavior more predictable.
• Reinforced Design: Includes a reinforced fork at the knuckle junction and a double shear mount for the trailing arm that remains independent of the subframe bolt.

Fitment / Applications

• 2013-2016 Scion FR-S
• 2013-2020 Subaru BRZ
• 2017-2020 Toyota 86
• 2022+ Toyota GR86
• 2022+ Subaru BRZ

Notes

• Designed to reduce anti-squat and move toward a pro-squat geometry for better stability under acceleration.
• The trailing arm mount is independent from the subframe bolt for increased strength and ease of adjustment.