331-01370 Rear Mono Ball Bearing Mount Set

This set replaces all rubber mounts at both ends of the rear suspension arms with mono ball bearings.
Note: Even on areas where BMW OEM parts use ball bearings, mono ball bearings may be used.

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

331-01370-G8XM
Rear Mono Ball Bearing Mount Set
Applicable Models: BMW G80/81/82/83-M3/M4
Set Details
332-01321-G8XM Rear Monoball Bearing Mount Camber Arm IN (2P) G8XM
332-01341-G8XM Monoball Bearing Mount Rear Trailing Arm IN (2P) G8XM
332-01361-G8XM Monoball 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
Applicable models:BMW F80/F82/F83/F87-M3/M4/M2/M2C
Set Details
332-01321-F8XM Mono Ball Bearing Mount Rear Control Arm IN (2P) 
332-01341-F8XM Mono-Ball Bearing Mount Rear Trailing Arm (2P)   
332-01361-F8XM Mono-Ball Bearing Mount Rear Upper Arm (4P) 
333-01301-F8XM Rear Lower Arm Adjustable (2P)
　　
　
331-01370-E9XM
Rear Monoball Bearing Mount Set
Applicable models:BMW E90/92-M3
Set Details
332-01321-E9XM Mono-Ball Bearing Mount Rear Control Arm IN (2P) 
332-01341-E9XM Mono-Ball Bearing Mount Rear Trailing Arm (2P)  
332-01361-E9XM Mono-Ball Bearing Mount Rear Upper Arm (4P) 
333-01301-E9XM Rear Lower Arm Adjustable (2P)
　
　
331-01370-G29Z
Rear Monoball Bearing Mount Set
Applicable models:BMW G29-Z4, TOYOTA GR A90/A91-SUPRA
Set Details
332-01321-G29Z Monoball Bearing Mount Rear Control Arm IN (2P)  
332-01341-G29Z Monoball Bearing Mount Rear Trailing Arm IN (2P)
332-01342-G29Z Monoball Bearing Mount Rear Trailing Arm OUT (2P)  
332-01363-G29Z Mono-Ball Bearing Mount Rear Guide Arm IN (2P)
332-01364-G29Z Monoball Bearing Mount Rear Guide Arm OUT (2P) 
332-01365-G29Z Monoball 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 (2P) 

Material
Mount Housing: Stainless Steel (SUS303)
Arm Rod: Aluminum / Taflam Coating
　
　
　
Ride Stability and Handling
Tires achieve cornering force by maintaining optimal contact with the road surface.
To achieve this, replacing the rubber mounts at both ends of the suspension arms—which act as pivot points during suspension movement—with monoball bearings eliminates pivot point displacement. Consequently, even under high lateral G-forces during cornering or when applying significant traction, the tires maintain stable, proper contact with the road surface, thereby enhancing cornering force.
　　
Reduced Resistance
Suspension arms experience significant friction due to the twisting motion of the rubber mounts. This limits the shock absorber's damping range, making it difficult to balance anti-roll and road-following performance, thereby restricting cornering force.Changing to a monoball bearing mountdrastically reduces friction, broadens the shock absorber's damping range, and improves both anti-roll and tire road-following performance.
　
Durability
To improve durability, we use the largest possible diameter monoball bearings. This contributes not only to handling under cornering forces but also to enhancing durability and reducing noise.
　
Corrosion Resistance
The mount housing uses stainless steel with high corrosion resistance.
　
Rear Adjustable Arm
Adjustable arms are primarily used to widen the alignment adjustment range.
Includes a suspension mount set featuring mono ball bearings in the joints.

Install as a set!
Using mono ball bearings for all suspension mounts enhances performance. Using them only in some areas can cause input to concentrate on weaker points, disrupting suspension movement and potentially reducing performance.

Caution
Product installation may require specialized knowledge and skills; please entrust it to an experienced workshop.

Important Notice Regarding Orders
Since we ship orders 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 after you place it.
Please feel free to inquire about delivery times and your place in the queue.