SPL Parts 2013+ Subaru BRZ/Toyota 86 / 2015+ Subaru WRX/STI Rear Lower Camber Arms

Adjustable Rear Lower Camber Arms for Subaru BRZ, Toyota 86/GR86, and Subaru WRX/STI with SPL RLL FRS

The SPL RLL FRS replaces the factory rubber-bushed rear lower control arm on the Subaru BRZ, Scion FR-S, Toyota 86, GR86, and Subaru WRX/STI platform with a fully adjustable billet aluminum assembly that delivers precise camber, track, and motion ratio control. Designed using Finite Element Analysis, the SPL RLL FRS provides up to 1.375 inches of total length adjustment, a 50 percent wider range than many competitors, and three shock and sway bar mounting positions for on-the-fly spring rate and sway bar tuning without changing parts.

Features and Benefits

• CNC milled 6061-T6 billet aluminum main arm, black anodized; 17 percent lighter than the OEM arm at 3.57 lbs per arm
• Electroless nickel plated 4130 chromoly steel double adjuster with 360-degree 6061-T6 aluminum clamps; no jam nuts required for adjustment
• Ti-6Al-4V titanium 1/4-20 socket head Allen screws, blue anodized for weight savings and corrosion resistance
• 3-piece PTFE-lined FK spherical rod ends, 5/8-inch (15.8mm) diameter, made in the USA; self-lubricating, self-cleaning, operating range -65 to 325 degrees F
• Up to 1.375 inches (35mm) of total length adjustment, 50 percent more than many comparable products
• Three position mounting holes for shock mount and sway bar end link allow motion ratio adjustment equivalent to plus or minus 13 percent spring rate change without a spring swap
• Sway bar effective rate adjustable as if switching to a bar 0.5mm larger or smaller
• Eliminates camber loss from bushing deflection under hard cornering and braking loads
• Compatible with 2008-2021 WRX/STI (GR/VA) and 2022+ WRX; fits Scion FR-S, Subaru BRZ, Toyota 86, and Toyota GR86
• Sold as a pair; made in the USA

Fitment

Specifications

What Is Included

• 2 x 6061-T6 billet aluminum rear lower camber arms (SPL RLL FRS)
• 4130 chromoly double adjuster with 360-degree rotating aluminum clamps
• 5/8-inch PTFE-lined FK spherical rod ends
• Ti-6Al-4V titanium 1/4-20 socket head Allen screws (blue anodized)
• 6061-T6 aluminum spacers
• Installation instructions

Frequently Asked Questions

What adjustment range does the SPL RLL FRS provide for camber?
The double adjuster delivers up to 1.375 inches (35mm) of total length adjustment, which translates to a wide range of camber change. This is approximately 50 percent more adjustment travel than many competing products, allowing alignment for everything from lightly lowered street setups to aggressive track configurations.

How does the motion ratio adjustment work on the SPL RLL FRS?
Three mounting positions for the shock absorber and sway bar end link allow you to change the motion ratio at the wheel without swapping springs. Moving between positions is equivalent to approximately plus or minus 13 percent spring rate change, so a 336 lb/in spring can act like 380 or 294 lb/in depending on which hole you use.

Is the SPL RLL FRS street legal?
Yes. The SPL RLL FRS is a suspension alignment component and does not affect emissions or vehicle safety systems. It is suitable for street use in all 50 states. A professional wheel alignment is required after installation.

Will this product fit the 2022+ Subaru WRX (VB chassis)?
The SPL RLL FRS is confirmed for the 2008-2021 WRX/STI (GR and VA chassis). A separate SPL product is available for the 2022+ VB WRX. Check the fitment table above and confirm your chassis code before ordering.

How do I adjust camber without jam nuts?
Loosen the two titanium 1/4-20 Allen screws on the 360-degree rotating clamp. Turn the double adjuster to set the desired length, then retighten the clamp screws. No wrenching on jam nuts is required, and adjustment can be performed on the car with the suspension at ride height.

Can I adjust spring rate and sway bar effectiveness without buying new parts?
Yes. The three mounting positions for the shock and sway bar end link let you dial in motion ratio on the car. This can replicate the effect of a spring 13 percent stiffer or softer, and adjusts sway bar effective rate as if you swapped to a bar 0.5mm larger or smaller.

Does installing the SPL RLL FRS affect my factory warranty?
Under the Magnuson-Moss Warranty Act, a manufacturer cannot void your powertrain warranty simply because you installed an aftermarket suspension component, unless they can show the part directly caused a failure. Consult your dealer or a legal advisor for guidance specific to your vehicle.

What rod end size do the SPL RLL FRS arms use?
The SPL RLL FRS uses 5/8-inch (15.8mm) PTFE-lined FK spherical rod ends manufactured in the USA. Replacement rod ends are available directly from SPL Parts if service is needed.

Installation Instructions

1. Safely raise and support the vehicle on jack stands; remove the rear wheels for access.
2. Record the current alignment settings or photograph the OEM arm position for reference.
3. Remove the OEM rear lower control arm mounting bolts and set the arm aside.
4. Place the SPL RLL FRS next to the OEM arm and pre-set it to match the center-to-center length with equal thread engagement on both ends of the double adjuster.
5. Select the shock mount and sway bar end link position that matches your setup goals.
6. Install the SPL RLL FRS with OEM or supplied hardware; snug bolts but do not fully torque until the car is at ride height.
7. Lower the vehicle to ride height under the vehicle weight and torque all mounting bolts to factory specification.
8. Tighten the 360-degree rotating clamps with the supplied 1/4-20 titanium Allen screws to lock the adjuster.
9. Have the vehicle professionally aligned on a four-wheel alignment rack before driving.

Proposition 65 Warning: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, visit www.p65warnings.ca.gov.