331-01370 Rear Mono Ball Bearing Mount Set

Rear Mono-Ball Bearing Mount Set
　
This set is designed to replace the rubber mounts at both ends of all rear suspension arms with mono-ball bearings.
Note: Even in areas where BMW uses standard ball bearings, mono-ball bearings may have been installed.

For vehicles prior to the E46-M3, please purchase from the individual product pages. 　
　
　
Set Lineup

331-01370-G8XM
Rear Monoball Bearing Mount Set
Compatible Models: BMW G80/81/82/83-M3/M4
Set Details
332-01321-G8XM Rear Monoball Bearing Mount for Camber Arm IN (2P) G8XM
332-01341-G8XM Single Ball Bearing Mount Rear Trailing Arm IN (2P) G8XM
332-01361-G8XM Mono-ball Bearing Mount Rear Upper Arm IN (4P) G8XM
333-01301-G8XM Rear Lower Arm Adjustable (2P) F8XM
　
331-01370-F8XM
Rear Monoball Bearing Mount Set
Compatible models:BMW F80/F82/F83/F87-M3/M4/M2/M2C
Set Details
332-01321-F8XM Single-row ball bearing mount, rear camber arm, IN (2-pack) 
332-01341-F8XM Single-Ball Bearing Mount, Rear Trailing Arm (2-pack)   
332-01361-F8XM Single-Ball Bearing Mount, Rear Upper Arm (4P) 
333-01301-F8XM Rear Lower Arm, Adjustable (2-piece)
　　
　
331-01370-E9XM
Rear Monoball Bearing Mount Set
Compatible models:BMW E90/92 M3
Set Details
332-01321-E9XM Single-row ball bearing mount, rear camber arm, IN (2-pack) 
332-01341-E9XM Single-Ball Bearing Mount, Rear Trailing Arm (2-pack)  
332-01361-E9XM Single-Ball Bearing Mount, Rear Upper Arm (4-piece set) 
333-01301-E9XM Rear Lower Arm, Adjustable (2-piece)
　
　
331-01370-G29Z
Rear Monoball Bearing Mount Set
Compatible models:BMW G29 Z4, Toyota GR A90/A91 Supra
Set Details
332-01321-G29Z Single-Ball Bearing Mount, Rear Control Arm, IN (2P)  
332-01341-G29Z Single-Ball Bearing Mount, Rear Trailing Arm, IN (2P)
332-01342-G29Z Monoball Bearing Mount, Rear Trailing Arm OUT (2P)  
332-01363-G29Z Single-Ball Bearing Mount, Rear Guide Arm, IN (2P)
332-01364-G29Z Single Ball Bearing Mount, Rear Guide Arm OUT (2P) 
332-01365-G29Z Single-Ball Bearing Mount, Rear Control Arm IN (2P)
332-01366-G29Z Monoball Bearing Mount, Rear Control Arm OUT (2P) 
333-01303-G29Z Rear Track Arm, Adjustable (2-piece) 

Material
Mount Housing: Stainless Steel (SUS303)
Arm Rod: Aluminum / Tufram-treated
　
　
　
Driving Stability and Handling
Tires generate cornering force by maintaining optimal contact with the road surface.
To achieve this, replacing the rubber mounts at both ends of the arms—which serve as pivot points for suspension movement—with single-ball bearings prevents the pivot points from shifting. As a result, even when subjected to high lateral G-forces during cornering or when applying significant traction, the tires can maintain stable and proper contact with the road surface, thereby improving cornering force.
　　
Reduced Resistance
Since suspension arms move due to the twisting of rubber mounts, they are subject to very high friction. Consequently, the shock absorber’s damping range is limited, making it difficult to balance anti-roll performance with road-following capability, and cornering force is restricted.By switching to a monoball bearing mount,friction is drastically reduced, the shock absorber’s damping range expands, and both anti-roll performance and tire road-following capability are improved.
　
Durability
To improve durability, we use the largest-diameter mono-ball bearings possible. This contributes not only to cornering force but also to durability and noise reduction.
　
Corrosion Resistance
The mount housing is made of stainless steel with high corrosion resistance.
　
Rear Adjustable Arm
Adjustable arms are primarily used to expand the range of alignment adjustment.
Mono-ball bearings are used in the joints and are included in the suspension mount set.
　
Install the entire set!
Having all suspension mounts equipped with mono-ball bearings improves performance. If only some are used, stress may concentrate on the weaker points, disrupting suspension movement and potentially reducing performance.

Note
Product installation may require specialized knowledge and skills, so please have it performed by an experienced facility.

Important Information Regarding Orders
Since we ship products in the order they are received, you can place an order even if an item is currently out of stock. However, this means we may not be able to ship your order immediately.
Please feel free to contact us regarding delivery times and order priority.