SPL Parts Adjustable Rear Lower Camber Arms for 86, FR-S, BRZ, WRX, Forester - SPL RLL FRS

The SPL Parts Adjustable Rear Lower Camber Arms (Part #SPL RLL FRS) deliver unmatched adjustability, rigidity, and precision for Toyota and Subaru performance platforms. Designed to replace compliant OEM arms, these rear lower links eliminate bushing deflection, reduce dynamic alignment change, and dramatically improve suspension response and driver feedback for street and track use.

With a wide camber and motion ratio adjustment range, SPL’s rear lower arms allow advanced tuning of spring and sway bar effectiveness without changing components. The jam nut-free 360-degree clamp system enables fast, precise, on-car adjustments that stay locked under hard use.

• Brand: SPL Parts
• Part Number: SPL RLL FRS
• Position: Rear Lower
• Component Type: Adjustable rear lower camber arms
• Weight: 3.57 lbs (1.62 kg) per arm - approx. 17% lighter than OEM
• Adjustability:
• Large camber adjustment range
• Adjustable motion ratios for spring, shock, and sway bar
• Rod Ends: Self-cleaning, US-made FK PTFE-lined spherical bearings
• Double Adjuster: Large-diameter chromoly with up to 1.375 in (35 mm) total length adjustment
• Clamp Design: 360-degree clamps for jam nut-free adjustment
• Use Case: Daily driver, performance street, and race applications
• Sold As: Pair
• Manufacturing: Made in the USA

Performance Benefits

• Eliminates camber loss caused by rubber or polyurethane bushing deflection
• Improves rear suspension response, grip, and driver feedback
• Allows precise camber tuning and repeatable alignment settings
• Enables quick motion ratio changes without swapping springs or sway bars
• Reduces binding under load for more predictable handling

Adjustable Motion Ratios Explained

Three mounting positions for the shock and sway bar endlink allow fast geometry changes:

• A 6.0 kg/mm (336 lb/in) spring can behave like 6.8, 6.0, or 5.2 kg/mm (+/-13%)
• An 18 mm sway bar can behave like 18.5 mm, 18.0 mm, or 17.5 mm (geometry permitting)

This flexibility allows fine-tuning balance and grip for different tracks and driving conditions.

Construction & Materials

• 6061-T6 aluminum arms, anodized black
• 6061-T6 aluminum spacers and 360-degree clamps
• 4130 chromoly steel double adjuster, electroless nickel plated
• Ti-6Al-4V titanium 1/4-20 socket head Allen screws, anodized blue

Adjustment is simple: loosen the titanium hardware, rotate the double adjuster to set camber, then retighten to lock the setting.

Vehicle Fitment

• Toyota GR86 ZN8 (2021+)
• Toyota 86 / Scion FR-S ZN6 (2013-2021)
• Subaru BRZ ZC6 / ZD8 (2013+)
• Subaru WRX / STI GR / VA (2008-2021)
• Subaru WRX VB (2022+, 6MT only)
• Subaru Forester (2009-2017)

Replaces OEM Part Numbers:

• Toyota: SU003-08417, SU003-04490
• Subaru: 20250-AL011, 20250-FG042, 20250-AJ040, 20250-CA010