R12/GT Upper A-arm Replacement - R12-10U for Yokomo  [R12-10U]

Yokomo R12-10U Upper
Price:
NZD$5.80
Brand:
Yokomo
Model:
R12-10U
GTIN:
3888
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Or you may find similar product under the
Spares / Hop-ups - Yokomo - R12 category
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Service upper arm for R12/GT models

This replacement upper A-arm is provided as a standard service item for the Yokomo R12/GT range. It fits directly in place of worn components and supports typical setup changes carried out during chassis tuning. The paragraphs that follow explain fitment scope, mounting considerations, and the arm's effect on suspension geometry.

Only the R12/GT variants listed are supported. Confirm your chassis code and measure mounting and ball stud locations to ensure correct fitment before purchase.

Supported chassis: GT5-R35, GT5-SC430, GT3-REA, GT3-IS350, GT3-B4, GT3-CAX, GT3-BRZ, GT3-AHP, GT-B, GT5-R2, GT5-RS2.

Installation notes: Install this A-arm using the chassis original fasteners and ball studs. While replacing, check hinge pins and bushings for wear and confirm camber and toe settings after installation. Secure hardware to the vehicle manufacturer's recommended torque and check for unobstructed suspension movement.

Tuning role: The upper arm's condition changes camber gain, roll center height, and steering return. Fit a fresh arm to restore baseline geometry prior to adjusting shocks, sway bars, or toe links.
Remark :
Due to limited stock availability, please notice that some Yokomo items may have to order from the factory and the ready time is around 4-6 weeks. Customer purchases the item is assumed to accept the waiting time which allows us to order directly from the manufacturer if the item is out of our warehouse.

Does this cover every R12/GT variant?

It covers only the specific models listed above. Match your chassis code with the supported list to confirm compatibility.

Should I replace ball studs when fitting?

In most cases the original ball studs can be reused, but inspect them for wear and replace if they show damage or excessive play.

Any setup tips after swapping the arm?

After fitting, recheck camber and toe and verify suspension moves freely. Use this as a baseline before making finer tuning changes.

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