SPL Parts 2020+ Toyota GR Supra (A90) / 2019+ BMW Z4 (G29) Front Lower Control Arms

If you're looking to fine-tune your 2019-2024 BMW Z4's suspension for better handling and alignment, these front lower control arms from SPL Parts are a solid option. They replace your stock arms and give you the ability to adjust camber and track width, which is crucial for getting your alignment dialed in, especially if you've lowered the vehicle. These arms are designed to work with both the BMW Z4 and the Toyota GR Supra, sharing a lot of the same underpinnings.

What sets these apart is the adjustment system. Instead of fighting with jam nuts like on older setups, SPL uses their exclusive Double Adjuster. This piece is machined from 4130 Chromoly, gun drilled to keep the weight down, and then plated with electroless nickel for good corrosion resistance. The arms themselves are made from lightweight 6061-T6 billet aluminum, and the hardware is anodized titanium, further shaving off unsprung weight without sacrificing strength. You also get stainless steel spacers to help correct the roll center if your car is lowered, and the use of FK Rod Ends and high-misalignment spherical bearings means you get smooth articulation and eliminate the flex you might find in the factory arms.

These control arms are sold as a pair and are proudly made in the USA. They use low-friction, Teflon-lined spherical bearings and rod ends, which are designed to handle the stresses of performance driving while allowing for full articulation and preventing binding. This means you can achieve precise alignment settings and maintain consistent handling characteristics.