PO Closed 23rd SEP 2025
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SHIBATА GRK4/5 Vertical Rear Upper Bracket
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
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Crafted from high-grade aluminum with a durable anodized finish in three color options: Black, Purple, and Red.
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Shifts the upper arm mounting from a two-point to a single-point setting for a revolutionary change in setup.
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Engineered for direct compatibility with GRK5-R, GRK5, and GRK4 chassis platforms.
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Designed to work in conjunction with the GRKRWD single-arm upper arm shaft (sold separately) for complete conversion.
Why Choose This?
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The single-point support system offers a substantial reduction in unsprung weight for sharper suspension response.
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Dramatically simplifies maintenance and tuning adjustments, saving valuable time during pit stops.
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Maintains full functionality for users who prefer a standard vertical upper deck layout.
Product Information
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Product Names: SHIBATA R31S341BK GRK4/5 Vertical Rear Upper Bracket (Black)
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SHIBATA R31S341PU GRK4/5 Vertical Rear Upper Bracket (Purple)
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SHIBATA R31S341RD GRK4/5 Vertical Rear Upper Bracket (Red)
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Material: Aluminum
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Finish: Anodized
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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.
SHIBATА R31S341BK GRK4/5 Vertical Rear Upper Bracket (Black)
SHIBATА R31S341PU GRK4/5 Vertical Rear Upper Bracket (Purple)
SHIBATА R31S341RD GRK4/5 Vertical Rear Upper Bracket (Red)
SHIBATА R31S118 GRK RWD Single-Arm Upper Arm Shaft
Introduce a new standard of efficiency and performance to your GRK chassis with the SHIBATA GRK RWD Single-Arm Upper Arm Shaft. This critical component is the key to unlocking a revolutionary single-point suspension setup, working in concert with the vertical upper bracket to deliver unmatched maintainability and a noticeable reduction in weight.
Key Features
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Fabricated from a high-strength material and treated with a special wear-resistant coating for exceptional durability.
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Serves as the essential pivot shaft that enables the conversion to a single-arm upper arm configuration.
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Designed specifically for use with the compatible SHIBATA Vertical Rear Upper Bracket (sold separately).
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Allows the upper arm to be supported at a single point on the damper stay instead of the traditional two-point setting.
Why Choose This?
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This conversion significantly simplifies suspension adjustments and maintenance, saving crucial time during tuning.
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The reduction in components and hardware contributes to a lighter overall rear assembly.
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Offers a performance-oriented upgrade path for users with a standard vertical upper deck seeking advanced tuning.
Product Information
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Product Name: SHIBATA R31S118 GRK RWD Single-Arm Upper Arm Shaft
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Coating: Special Wear-Resistant
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Function: Enables Single-Point Upper Arm Mounting
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Requires: SHIBATA Vertical Rear Upper Bracket (e.g., R31S341BK/PU/RD)
Choose this arm shaft to complete the transformation to a modern, single-point suspension system. It is the definitive component for drivers focused on achieving the highest level of mechanical efficiency and tuning flexibility from their GRK platform.
