
SHIBATА R31S341BK GRK4/5 Vertical Rear Upper Bracket (Black)
PO Closed 23rd SEP 2025
~~~
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)
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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.
Original: $3,135.00
-70%$3,135.00
$940.50More Images

SHIBATА R31S341BK GRK4/5 Vertical Rear Upper Bracket (Black)
PO Closed 23rd SEP 2025
~~~
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.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
PO Closed 23rd SEP 2025
~~~
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.












