[PO OCT 2025] SHIBATА R31S341BK GRK4/5 Vertical Rear Upper Bracket (Black)

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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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.