SHIBATА R31S341PU GRK4/5 Vertical Rear Upper Bracket (Purple)

PO Closed 23rd SEP 2025

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Optimize the rear suspension of your GRK4 or GRK5 chassis with the SHIBATA Vertical Rear Upper Bracket. This precision aluminum component introduces a innovative single-point mounting system, designed to reduce weight and significantly improve maintenance efficiency for a more responsive and tunable driving experience.

Key Features

• Crafted from high-grade aluminum with a durable anodized finish in three color options: Black, Purple, and Red.

• Shifts the upper arm mounting from a two-point to a single-point setting for a revolutionary change in setup.

• Engineered for direct compatibility with GRK5-R, GRK5, and GRK4 chassis platforms.

• Designed to work in conjunction with the GRKRWD single-arm upper arm shaft (sold separately) for complete conversion.

Why Choose This?

• The single-point support system offers a substantial reduction in unsprung weight for sharper suspension response.

• Dramatically simplifies maintenance and tuning adjustments, saving valuable time during pit stops.

• Maintains full functionality for users who prefer a standard vertical upper deck layout.

Product Information

• Product Names: SHIBATA R31S341BK GRK4/5 Vertical Rear Upper Bracket (Black)

• SHIBATA R31S341PU GRK4/5 Vertical Rear Upper Bracket (Purple)

• SHIBATA R31S341RD GRK4/5 Vertical Rear Upper Bracket (Red)

• Material: Aluminum

• Finish: Anodized

• Compatibility: GRK5-R, GRK5, GRK4 Chassis

Select this bracket to modernize your chassis's rear end with a focus on performance and serviceability. It is an intelligent upgrade for serious competitors seeking every possible advantage in weight savings and tunability.