SPL Parts Adjustable Rear Upper Arms for G2X / G42 BMW and A90 / A91 Toyota Supra GR

SPL Parts Adjustable Rear Upper Arms for G2X / G42 BMW and A90 / A91 Toyota Supra GR

SPL Parts’ TITANIUM Series Rear Upper Arms (RUA) significantly enhance the range of rear camber adjustment for high-performance track and street applications, making them essential for lowered vehicles to achieve proper alignment. The eccentric washer on the OEM control arm lacks the adjustment range necessary to bring camber back into spec. SPL Parts’ design features gun-drilled 2024 Aluminum center links, clamps, and clevises, paired with Blue Anodized Titanium socket head cap screws and their 360-degree rotating clamp system. This combination ensures superior strength, performance, durability, and easy adjustment. The days of struggling with wrenches to tighten jam nuts while maintaining proper bearing orientation are over—a simple 3/16″ Allen key is all that’s needed to secure alignment settings.

FK Spherical Rod Ends replace the soft, worn-out bushings found on stock links, minimizing alignment changes in the rear suspension during hard cornering, acceleration, and braking. These rod ends feature a Teflon liner for quiet operation, low friction, smooth articulation, and elimination of bushing deflection under load. The PTFE liner is chemically bonded to the inner diameter of the race, offering exceptional load-bearing capacity and enhanced dynamic wear resistance. With an operating temperature range from -65º to 325ºF, these rod ends provide robust reliability for both street and track applications.

Manufacturing and R&D

• USA sourced materials with certification ensure SPL products are built with the best materials.
• CNC machining by local machine shops with years of high tech machining experience, to meet exacting tolerances.
• TIG welding is performed by local professional welders with years of experience, to ensure the highest quality welds for maximum strength.
• All parts are hand fitted to ensure good fit and smooth threading. Anti-seize and 3M internal panel coating applied where necessary for protection.
• In-house research and development. Because SPL designs and uses the products, they can provide total support to their customers.
• Spherical bearings with teflon liners, are self cleaning and self lubricating, providing high performance and long life.
• Innovative adjuster design, provides quicker alignments and proper bearing centering. Tight thread tolerances for precision.
• Made with pride in USA by skilled machinists / welders, using quality materials and finishes, innovative designs and R&D.

Features

• Gun drilled 2024 aluminum links to reduce unsprung weight
• Blue anodized titanium socket head cap screws
• 6061-T6 aluminum rotating clamp design
• Low friction 3 piece teflon lined FK Heim joints / rod ends
• Sold as two pairs (rear upper lateral & rear upper trailing arms)
• Made in the USA

Applications

• BMW 218i: G42 (2022+)
• BMW 220i: G42 (2021+)
• BMW 230i: G42 (2021+)
• BMW 318i: G20, G21 (2020+)
• BMW 320i: G20, G21 (2019+)
• BMW 330i: G20, G21 (2019+)
• BMW 420i: G22, G23 (2021+)
• BMW 430i: G22, G23 (2021+)
• BMW M240i: G42 (2021+)
• BMW M340i: G20, G21 (2019+)
• BMW M440i: G22, G23 (2021+)
• BMW Z4: G29 (2019+)
• Toyota GR Supra: A90, A91 (2020+)

Notes

• Instruction manual

About SPL Parts

From full racing to high-performance street applications, SPL Parts’ suspension products offer adjustability and enhanced performance for custom alignment needs. Their commitment to top-quality construction and innovative features has made SPL Parts the choice of leading race teams, as well as consumers seeking the best alignment solutions for their high-performance street vehicles.