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- Camber / Caster Kits
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These SPL Parts Front Lower Street Control arms replace OEM Part numbers 31122405860 and 31122405859
SPL Parts is a performance suspension manufacturer that designs and tests their products all in-house here in the USA. Additionally, all materials used are sourced from American suppliers to ensure consistently high quality products. SPL Parts products are all constructed using chromoly seamless straight tubing, DOM mandrel bent tubing, and 6061 and 2024 aluminum for high strength and quality. All TIG welding and CNC machining is also done locally by professional welders and machine shops to meet exact quality standards and tolerance specifications. For anything from racing to street driven needs, SPL Parts offer an amazing line of premium quality products that are perfect to get your car back in spec.
These SPL front lower control arms open up a wide range of adjustment for roll center, camber, and track width adjustment and allow for full articulation with the correct ball joint angle. Instead of using traditional jam nuts, the main arm is slotted to allow the use of pinch bolts and SPL rotating clamps on their exclusive adjuster, making it easier to lock in track width and camber specifications.
*DOES NOT include headlight adjusting rod
SPL Parts Billet Lower Control/Trailing Arms Feature:
Fits the following BMWs:
2006-2013 E9X BMW RWD Submodels
2008-2013 E82/88 BMW All Submodels
These SPL Parts Front Lower Street Control arms replace OEM Part numbers 31122405860 and 31122405859
SPL Parts is a performance suspension manufacturer that designs and tests their products all in-house here in the USA. Additionally, all materials used are sourced from American suppliers to ensure consistently high quality products. SPL Parts products are all constructed using chromoly seamless straight tubing, DOM mandrel bent tubing, and 6061 and 2024 aluminum for high strength and quality. All TIG welding and CNC machining is also done locally by professional welders and machine shops to meet exact quality standards and tolerance specifications. For anything from racing to street driven needs, SPL Parts offer an amazing line of premium quality products that are perfect to get your car back in spec.
These SPL front lower control arms open up a wide range of adjustment for roll center, camber, and track width adjustment and allow for full articulation with the correct ball joint angle. Instead of using traditional jam nuts, the main arm is slotted to allow the use of pinch bolts and SPL rotating clamps on their exclusive adjuster, making it easier to lock in track width and camber specifications.
*includes headlight adjusting rod
SPL Parts Billet Lower Control/Trailing Arms Feature:
Fits the following BMWs:
2006-2013 E9X BMW RWD Submodels
2008-2013 E82/88 BMW All Submodels
Upgrade your E9X BMW with this all-in-one Turner Motorsport bundle featuring Fixed Camber Plates and Monoball Front Thrust Arms. Designed to improve handling, reduce deflection, and increase steering precision, this package delivers a noticeable performance boost both on the street and track—all without breaking the bank.
E9X Front Camber Plates – Fixed Position
Most BMWs leave the factory with conservative front camber to encourage understeer, which compromises handling and accelerates tire wear by reducing contact patch engagement. Turner Motorsport’s Fixed Camber Plates are a simple, effective solution, adding up to 2.5° of negative camber to your E90, E92, or E93.
By increasing front negative camber, you’ll enjoy:
Improved turn-in and cornering confidence
Reduced tire wear
Better overall handling balance
Designed with expertise gained from Turner Motorsport’s participation in the Speed World Challenge series, these plates are offset for the optimal camber/caster combination when running stock-diameter springs. They add only ~6mm of ride height and utilize the factory upper strut mount for a clean, straightforward installation—perfect for racing classes where adjustable camber plates are restricted, or for enthusiasts who want a simple, cost-effective negative camber upgrade.
Installation: Press out OEM studs and alignment pin; see Turner’s detailed PDF for guidance.
Monoball Front Thrust Arm Upgrade Kit
BMW’s stock front thrust arm bushings are soft, compliant, and prone to wear—allowing fore/aft wheel movement that degrades steering feel, alignment, braking response, and tire performance. While designed for comfort, these OEM components fall short for enthusiasts and track-focused drivers seeking maximum control.
Turner Motorsport’s Monoball Front Thrust Arms solve these issues with:
Sealed OEM BMW ball joints for exceptional durability
CNC-machined 6061-T6 anodized aluminum bearing assembly with knurled OD for perfect press-fit and long life
Low-friction, no-bind design to eliminate unwanted suspension deflection
The result? Instantaneous turn-in, precise steering, direct braking feedback, and exceptional suspension feel, all while maintaining comfort and reliability for daily driving. Perfect for track use or spirited street driving, these thrust arms are a no-compromise upgrade for anyone looking to enhance BMW front-end performance.