SPL Parts SPL RUA NC Titanium Rear Upper Camber Arms NC Miata/RX-8

Vehicle Fitment

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

Fitment Notes

• One retailer lists the RX-8 range as 2004-2011 rather than 2003-2012 used by SPL and the majority of retailers. Treating 2003-2012 as the confirmed range, consistent with SPL's naming for the companion RTAEL NC rear toe arm covered previously - this appears to be an isolated retailer listing error.

Features

• Significantly increases rear camber adjustment range beyond what the factory eccentric washer allows
• Essential for lowered cars to bring camber back into proper alignment spec
• Includes stainless steel spacers to correct roll center on lowered vehicles
• Black anodized, gun-drilled 2024 aluminum alloy main links to reduce unsprung weight
• 360-degree rotating clamp design for quick, precise adjustment
• Blue anodized titanium hardware for further weight savings without sacrificing strength
• 3-piece Teflon-lined FK spherical rod ends eliminate soft, worn factory bushings
• Reduces unwanted alignment change under hard cornering, acceleration, and braking
• Grade 12.9 hardware with distorted-thread locknuts
• Designed using computer-aided design and finite element analysis
• 1-year manufacturer warranty against defects in material and workmanship

Specifications

• Type: Rear upper lateral (camber) arm
• Series: Titanium
• Link material: Gun-drilled 2024 aluminum alloy
• Finish: Black anodized
• Hardware: Blue anodized titanium, grade 12.9 with distorted-thread locknuts
• Bearing type: 3-piece Teflon-lined FK heim joints/rod ends
• Includes: Stainless steel roll center correction spacers
• Warranty: 1 year from date of purchase

Included Components

• 1x Pair SPL Parts rear upper lateral (camber) arms
• Stainless steel spacers for roll center correction

Product Description

The SPL Parts SPL RUA NC is a set of Titanium Series rear upper lateral arms for the NC Miata and RX-8, built to solve a specific problem: once these cars are lowered, the factory rear camber adjustment - limited to an eccentric washer on the lower control arm - simply doesn't have enough range to bring camber back into proper alignment spec. These arms replace that limited adjustment with a genuinely wide range, making them close to a requirement rather than an optional upgrade for anyone running a meaningfully lowered ride height.

Beyond camber range, the included stainless steel spacers address roll center correction, which shifts as ride height drops and affects how the rear suspension geometry behaves through its travel - a detail that's easy to overlook but matters for consistent handling on a lowered car. The 3-piece Teflon-lined FK spherical rod ends replace the factory bushings entirely, which cuts down on the alignment drift that soft rubber bushings allow under hard cornering, acceleration, and braking - the car holds its set alignment more consistently lap after lap or corner after corner.

Construction follows SPL's established approach: gun-drilled 2024 aluminum main links for reduced unsprung weight, a 360-degree rotating clamp for fast and precise adjustment, and blue anodized titanium hardware to shave further weight without giving up strength. Designed with finite element analysis rather than just scaled from an existing part, and backed by a 1-year warranty against material and workmanship defects. This pairs naturally with SPL's rear toe arm (RTAEL NC) for a complete rear suspension geometry correction on a lowered NC Miata or RX-8.