Whiteline Rear Control Arm Upper Camber Adjustable Bushing – 2004-2012 Mazda 3 / 2000-2013 Ford Focus

Whiteline Rear Control Arm Upper Camber Adjustable Bushing – 2004-2012 Mazda 3

Rear Camber Correction for the BK/BL Mazda 3
The Whiteline KCA394 rear upper control arm camber adjustable bushing for the 2004-2012 Mazda 3 (BK/BL chassis) provides rear camber adjustment beyond the factory alignment range. An eccentric bushing design at the rear upper arm position allows the alignment shop to set rear camber to the correct value for lowered applications or performance-optimized configurations where factory adjustment limits are exceeded.

DETAILS

• Eccentric bushing provides rear camber adjustment beyond factory range
• Allows rear camber correction for lowered BK/BL Mazda 3 applications
• Polyurethane compound for consistent geometry under load
• Fitment: 2004-2012 Mazda 3 (BK and BL chassis)
• Essential for lowered applications where factory range is exceeded

Mazda 3 Rear Camber and Lowering
Lowering the BK/BL Mazda 3 moves rear camber toward less negative — often outside the factory adjustment range. The KCA394’s eccentric design provides the additional adjustment range to restore correct rear camber at the lowered ride height.

Mazdaspeed 3 Application
The Mazdaspeed 3 is frequently lowered for performance use. On a lowered Mazdaspeed, correct rear geometry is important for tire contact and handling balance. The KCA394 gives alignment shops the tools to set correct rear camber on lowered Mazdaspeed 3 examples.

Performance Rear Camber Settings
For Mazda 3 and Mazdaspeed 3 cars used for autocross and track, the KCA394 allows running additional negative rear camber beyond the OEM spec for improved tyre contact under cornering.

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

Essential rear camber correction hardware for lowered Mazda 3 applications. Budget an afternoon for the job — bushing replacement is not complicated but does require the correct press tools and clean installation technique. Apply grease to all polyurethane-to-metal interfaces and assemble at ride height for correct bushing set. The improvement in chassis feel is immediate and the polyurethane will outlast whatever rubber is in there now.

What’s in the Box

• Eccentric bushing provides rear camber adjustment beyond factory range
• Allows rear camber correction for lowered BK/BL Mazda 3 applications
• Polyurethane compound for consistent geometry under load
• Essential for lowered applications where factory range is exceeded

Fitment