SPL Parts SPL RTAEL NC Rear Toe Arm Bumpsteer NC Miata/RX-8

Vehicle Fitment

• 2006-2015 Mazda MX-5 Miata (NC)
• 2003-2012 Mazda RX-8

Fitment Notes

• Particularly relevant for owners who have lowered their NC Miata or RX-8, since the factory rear toe links develop excess toe-in at reduced ride heights that cannot be corrected with stock hardware.

Features

• Combines toe adjustment, bump steer correction, and eccentric lockout in a single arm
• Eliminates bushing deflection present in the factory design
• Wide adjustment range corrects excess toe-in caused by lowering the vehicle
• Integrated eccentric lockout prevents alignment settings from slipping over time
• 360-degree rotating clamp design for quick, precise adjustment without fumbling with wrenches or jam nuts
• Black anodized, gun-drilled 2024 aluminum main links
• Designed for high-performance street and race use
• Materials sourced in the USA and CNC machined domestically

Specifications

• Type: Rear toe arm with bump steer adjustment and eccentric lockout
• Link material: Gun-drilled 2024 aluminum
• Finish: Black anodized
• Adjustment mechanism: 360-degree rotating clamp
• Lockout: Integrated eccentric lockout

Included Components

• 1x Pair SPL Parts rear toe arms with bump steer adjustment and eccentric lockout

Product Description

The SPL Parts SPL RTAEL NC is a rear toe arm built for the 2006-2015 Mazda MX-5 Miata (NC) and 2003-2012 Mazda RX-8, combining three functions in one part: toe adjustment, bump steer correction, and a built-in eccentric lockout. This is a more complete solution than a simple adjustable toe arm - it's specifically designed to address a problem that shows up once these cars are lowered, where the factory rear links develop excess toe-in that can't be dialed back out, leading to handling issues and accelerated tire wear.

The eccentric lockout is a genuinely practical detail: rather than relying on jam nuts that need careful torque and orientation to keep the bearing properly aligned during tightening, the integrated lockout secures the set alignment cleanly, removing a common source of frustration (and alignment drift) during install and afterward on the road or track.

Construction follows SPL's standard approach across their toe arm lineup - black anodized, gun-drilled 2024 aluminum main links to save unsprung weight, paired with a 360-degree rotating clamp for fast, precise adjustment. Materials are sourced domestically and CNC machined in the USA. Given the specific mention of RX-8 compatibility alongside the NC Miata, this is a good part to flag for RX-8 owners doing suspension work as well, not just Miata builds - both platforms share enough rear suspension architecture that SPL engineered this single arm to cover both.