SPL Rear Adjustable Upper Arm Set | G8x M2, M3, M4
From full racing to high-performance street applications, SPL Parts’ suspension products deliver the adjustability and performance needed for custom alignment setups. Their commitment to high-quality construction and innovative engineering is why these products are trusted not only by top race teams, but also by consumers who demand the best alignment solutions for their high-performance street cars.
The SPL G8X adjustable Rear Upper Arms (RUA) are essential for maintaining correct rear camber and reducing tyre wear on both street and track vehicles. The factory BMW suspension has an aggressive camber curve through bump travel, which becomes especially noticeable on lowered cars. Excessive negative camber leads to premature inner-edge tyre wear and reduced traction under acceleration, while insufficient camber limits rear grip during cornering. SPL’s Rear Upper Arms provide a wide adjustment range for precise rear camber alignment, optimised for street or track use, while eliminating bushing deflection through the use of smooth-articulating, Teflon-lined rod ends in place of the soft OEM rubber bushings. This kit replaces the factory links commonly known as the rear wishbone and rear guide links.
The G8X Rear Upper Arms include gun-drilled 2024 aluminium traction links to reduce weight, along with a 6061-T6 billet aluminium curved upper camber arm, both finished in black anodising for corrosion resistance and durability. SPL’s exclusive 360-degree 6061-T6 aluminium Rotating Clamp design allows quick, precise adjustment of the dogbone, while the curved upper arm uses an innovative double-adjuster system that enables easy and accurate camber changes without removing the arm from the vehicle. The clamps are secured with blue-anodised titanium socket-head cap screws, providing accessible adjustment while further reducing unsprung weight without compromising strength. These Rear Upper Links deliver exceptional performance, durability and ease of adjustment — no more struggling with jam nuts while trying to keep bearings correctly oriented.
Sold as a complete kit for one car (4 total arms).
Made in the USA!
BMW G8X REAR ADJUSTABLE UPPER ARMS
Black-anodised and gun-drilled 2024 aluminium links.
6061-T6 billet aluminium curved upper arm with integrated double adjuster.
6061-T6 aluminium rotating clamps for a wider adjustment range.
Titanium socket-head cap screws.
Tapered stainless steel knuckle-mount spacers.
Low-friction, three-piece Teflon-lined FK rod ends.
Touched base with Sean to do some coding work on my F85 X5M. Not only was he a whiz with the tech stuff, knowing his way around without any difficulty. Very rare to find someone like Sean - I happily rate and recommend this business for anyone.
Samuel David
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First time at Southern BM today and it won't be my last. Efficient and quality service as I'd expected at a much more reasonable price than a BMW Dealer. The only downside, you'll drop your car off and will end up drooling over the m3s and m4s out front!
Bobby Turner
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After 3 other BMW workshops couldn't fix the problem with my M3. SouthernBM sorted it. Excellent to deal with, great communication and customer service.
David Dean
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Extremely happy and love this place. Great service from Eric. Bought and installed akrapovic exhaust system from this place. Also purchased and installed the M performance bonnet. 100% coming back for more service from this place.
Timothy Sung
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Thank you once again to John, Andrew and their team. Have been bringing our cars to them for several years now and have complete trust and faith in their workmanship and honesty.
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