Please Note: This is a PRE-ORDER.
Your order will be shipped as soon as the pre-order item arrives in stock. If your order includes both in-stock and pre-order items, the entire order will be held and shipped together once the pre-order item becomes available.
About Stock Arrival:
Some pre-order items are limited in quantity or may have Reduced production by the manufacturer.
Because of this, we might not receive the full amount we ordeRed.
If this happens, we’ll ship items in the order pre-orders were placed. (first-come, first-served basis)
If your order isn’t fulfilled in the first shipment, it will automatically move to the next batch.
Important Notes:
for some limited items or items with no restock plans, we may have to cancel your order.
Even if you pre-order early, we can’t guarantee your item will ship in the first batch.
About Release Dates:
Release dates or periods (if announced by the manufacturer) are shown on the product page.
However, release dates may be delayed due to the manufacturer’s circumstances.
Please treat release dates as estimates only.
Estimated Arrival (ETA): Early - Mid OCT 2025
PO Closes 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.
[PO OCT 2025] SHIBATА R31S341BK GRK4/5 Vertical Rear Upper Bracket (Black)
[PO OCT 2025] SHIBATА R31S341PU GRK4/5 Vertical Rear Upper Bracket (Purple)
[PO OCT 2025] SHIBATА R31S341RD GRK4/5 Vertical Rear Upper Bracket (Red)
[PO OCT 2025] 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.
