ISR Performance Rear Trailing Arms - Scion FR-S / Subaru BRZ 13+

The ISR Performance adjustable rear trailing arms for the Scion FR-S and Subaru BRZ 2013 and up give FT86 owners a way to control the rear suspension's fore-and-aft geometry after lowering. The factory trailing arm is a fixed-length piece, so once the car comes down, the rear hub position and the wheelbase on each side are whatever the drop happens to produce.

What the trailing arm controls

On the FR-S and BRZ rear suspension, the trailing arm locates the hub longitudinally. Adjusting its length lets you:

• Center the rear wheels in the wheel wells after a ride height change
• Equalize wheelbase side to side for a square, predictable rear
• Reduce rear bump steer by correcting the arm angle
• Replace worn factory arms with a stronger adjustable part

Compatibility

• Scion FR-S, 2013 and newer
• Subaru BRZ, 2013 and newer

Install notes

Set the arms to match the factory length as a starting point, then adjust with the car at ride height. Any change in trailing arm length will shift rear toe, so plan on an alignment once the setup is finalized. These arms pair well with ISR's rear lower control arms for the same chassis when the goal is a fully adjustable rear end.

All ISR Performance products are designed for off-road use only.