Whiteline Control Arm Brace – 2008-2014 Subaru WRX / STI

Whiteline Control Arm Brace – 2008-2014 Subaru WRX / STI

Reinforce the Front Control Arm on the GR/GV WRX and STI
The Whiteline KBR14 control arm brace for the 2008-2014 Subaru WRX and STI reinforces the front lower control arm against the flex that can occur under high cornering loads. By adding a bracing member to the arm structure, the brace reduces the compliance that allows the arm to twist under load, keeping front wheel geometry more consistent and improving the precision of front suspension response.

DETAILS

• Reinforces front lower control arm against flex under cornering loads
• Reduces compliance-induced front wheel geometry variation
• Direct bolt-on: 2008-2014 Subaru WRX and STI (GR/GV chassis)
• Complements other front suspension precision upgrades
• No modification to arm or chassis required

Control Arm Flex and Geometry Consistency
Under very high cornering loads, the front lower control arm can flex slightly along its length. This flex changes the effective geometry at the control arm’s connection points — allowing small but measurable camber and caster variations that affect front tyre contact consistency. The control arm brace stiffens the arm structure against this flex.

GR/GV Track and Competition Use
At track speeds and cornering loads, the effects of control arm flex are more significant than at street speeds. The KBR14 is particularly relevant for GR/GV WRX and STI cars used for autocross and circuit driving where the suspension is loaded repeatedly and consistently.

Part of the Front Suspension Precision Package
The control arm brace complements Whiteline’s front anti-lift kit, subframe locking bolts, and front strut tower bar — all working together to reduce front suspension compliance and improve geometry consistency under load.

Why Choose Whiteline

Whiteline has been engineering suspension components from their facility in Australia since 1979. Every product in their catalog is developed with a clear goal: measurable improvement in handling, stability, and tyre contact. Whiteline’s polyurethane bushings, sway bars, control arms, and alignment correction kits are engineered using finite element analysis and validated on track before they reach the market. Their components are direct-fit, bolt-on solutions designed for enthusiasts who want real performance gains without fabrication or custom work.

The RallySport Take

A precision upgrade for the GR/GV WRX and STI front suspension. Most effective on track-focused builds where the front suspension is loaded at its limits.

What’s in the Box

• Reinforces front lower control arm against flex under cornering loads
• Reduces compliance-induced front wheel geometry variation
• Complements other front suspension precision upgrades
• No modification to arm or chassis required

Fitment