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Stop Fighting Understeer Through Every Corner
Soft factory rubber bushings let the front end wander under hard cornering and braking, robbing feel and consistency lap after lap. This SuperPro alloy control arm and radius arm kit replaces the entire front lower control arm and radius arm assembly with forged alloy arms and SuperPro's proprietary bushings, giving independently adjustable caster on each side plus a fixed camber gain for sharper turn in and more predictable grip.
Key Features
- Complete front control arm and radius arm replacement, not just a bushing swap
- Delivers a fixed 1 degree of additional camber from the alloy lower control arm
- On car adjustable radius arms allow up to 0.8 degrees of caster increase or decrease per side
- Heim style bushing on the lower arm allows full articulation without binding, noise, or harshness
- Includes the spanner tool needed to dial in radius arm adjustment on the vehicle
- Reduces arm deflection under braking and cornering to improve tire wear and directional stability
- Forged Supaloy construction is lighter than the factory steel arm for reduced unsprung weight
Fitment Table
| Year Range | Make | Model |
|---|---|---|
| 2012-2018 | BMW | 328i |
| 2012-2018 | BMW | 330i |
| 2013-2016 | BMW | 335i |
| 2016-2018 | BMW | 340i |
| 2013-2018 | BMW | 320i |
This kit fits rear wheel drive F30, F31, F34, and F35 chassis 3 Series sedans, wagons, and Gran Turismo models. It does not fit xDrive all wheel drive variants or the F80 M3.
Specifications
| Detail | Value |
|---|---|
| MPN | ALOY0030K |
| SKU | SPRALOY0030K |
| UPC | Contact SuperPro USA for UPC verification |
| Kit Contents | 4 arms (2 lower control arms, 2 radius arms), 1 spanner tool |
| Camber Gain | 1 degree fixed, front lower control arm |
| Caster Adjustment | Up to 0.8 degrees per side, on car adjustable |
| Subframe Mount Width | 95mm caster arm subframe mount |
| Construction | Forged Supaloy aluminum arms with SuperPro bushings and ball joints |
| Warranty | 3 year warranty on Roll Control range arms and ball joints, to original purchaser |
| Alignment Required | Yes, wheel alignment required after installation |
What's Included
- 2 SuperPro alloy front lower control arms with integrated ball joints
- 2 SuperPro alloy front radius arms with adjustable bushings and ball joints
- 1 spanner tool for on car radius arm adjustment
- Installation hardware
About SuperPro
SuperPro is an Australian engineered suspension brand that designs and manufactures polyurethane bushings, sway bars, and control arm kits for daily driven, off road, and motorsport applications. Every SuperPro bushing, sway bar, and suspension arm is backed by the company's lifetime or Roll Control warranty to the original purchaser, and SuperPro places no restrictions on street, track, or competition use.
Related Parts on Our Site
- Shop more SuperPro suspension upgrades
- Browse our full suspension parts collection
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FAQ
What is the ALOY0030K?The ALOY0030K is a SuperPro alloy front control arm and radius arm kit for BMW F30, F31, F34, and F35 chassis 3 Series vehicles. It replaces the OEM lower control arms and radius arms with forged aluminum arms and adjustable bushings to add caster adjustment and a fixed camber gain.
Does this kit fit BMW M3 or M4 models?No. This kit is designed for non-M F chassis vehicles with a 95mm caster arm subframe mount and does not fit the F80 M3, F82 M4, or F87 M2.
Will installing this kit require a wheel alignment?Yes. A full wheel alignment is required after installing the ALOY0030K to properly set caster and camber to your specification. Skipping alignment after installing the ALOY0030K will lead to uneven tire wear.
How much caster adjustment does this kit provide?The radius arms are adjustable on car for up to 0.8 degrees of caster increase or decrease independently on each side, which is useful for correcting a pull or maximizing caster for grip.
Does the lower control arm change camber?Yes. The SuperPro alloy lower control arm is a fixed geometry arm that adds 1 degree of additional negative camber compared to the factory arm.
What bushings are used in this kit?The kit uses SuperPro's proprietary heim style bushing on the lower control arm, which allows full articulation and movement without binding, noise, or harshness.
Is this a direct bolt on replacement?Yes. It is a direct replacement for the factory front lower control arms and radius arms and does not require cutting or permanent modification.
What is included with this kit?The kit includes 2 lower control arms, 2 radius arms, both fitted with SuperPro bushings and ball joints, plus a spanner tool for on car adjustment.
Install Instructions
- Raise and safely support the vehicle, then remove the front wheels.
- Remove the factory lower control arm and radius arm from each side, noting orientation and hardware.
- Install the SuperPro alloy lower control arm and torque all fasteners to factory specification.
- Install the SuperPro radius arm and hand tighten before setting ride height.
- With the vehicle at ride height, use the included spanner to set the desired caster adjustment on each radius arm.
- Torque all radius arm hardware to specification once adjustment is set.
- Reinstall the wheels and lower the vehicle.
- Schedule a full wheel alignment to set camber and caster to your target specification.
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