Advice Blog Commercial
March 6, 2026
Speak to one of our experts.
Speak to one of our experts.
We’ve selected the material that offers the best balance of performance and comfort for your vehicle’s needs.
Our Comfort grade bushes are designed to enhance ride quality and minimise road noise, making them ideal for everyday driving. They are softer, providing maximum suspension articulation and a cushioned feel that absorbs bumps and vibrations effectively. This softer composition ensures a smoother, quieter driving experience, especially in Classic cars or Land Rovers. Comfort bushes maintain a balance between originality and ease of driving, catering to those who value a relaxed Factory-Fresh drive.
The Dynamic grade bushes offer a middle ground between Comfort and Performance. They are slightly firmer than the Comfort bushes, which improves handling and cornering response without sacrificing too much ride comfort. These bushes are ideal for drivers who enjoy a more engaging driving experience while still needing a level of comfort for daily use, whilst also being suitable for spirited driving & light track use.
Performance grade bushes are the stiffest of the three, designed for enthusiasts who demand the utmost in handling and control. They offer minimal deflection, enhancing vehicle response and stability during aggressive driving. These bushes are perfect for high-performance or track vehicles where precision and handling are critical. While they might sacrifice some ride comfort, they deliver superior driving dynamics and control, ideal for those who push their vehicle to its limits – Including Towing!
These rods are produced in 90 Shore A which allows them to be machined on a lathe.
Polybush Shop
Vehicle Sets
4AX
Number of bushes:
OEM number: 504039506
Vehicle Sets
4AY
Number of bushes:
OEM number: 504112265
Kits
Bushes Per Vehicle Set: 14
View Kit Contents
Kit 196
Kits
Bushes Per Vehicle Set: 14
View Kit Contents
Vehicle Sets
4AX
Number of bushes:
OEM number: 504039506
Vehicle Sets
4AY
Number of bushes:
OEM number: 504112265
Kits
Bushes Per Vehicle Set: 12
View Kit Contents
Kit 176
Kits
Bushes Per Vehicle Set: 12
View Kit Contents
Vehicle Sets
OE Reference: 504039506
Bushes Per Vehicle Set: 1
Vehicle Sets
OE Reference: 504039506
Bushes Per Vehicle Set: 1
Vehicle Sets
OE Reference: 504112265
Bushes Per Vehicle Set: 1
Vehicle Sets
OE Reference: 504112265
Bushes Per Vehicle Set: 1
Vehicle Sets
OE Reference: 8581021
Bushes Per Vehicle Set: 2
Vehicle Sets
OE Reference: 8581021
Bushes Per Vehicle Set: 2
Vehicle Sets
OE Reference: 93801556
Bushes Per Vehicle Set: 2
Vehicle Sets
OE Reference: 93801556
Bushes Per Vehicle Set: 2
Polybush – Thinsulate Beanie
Bushes Per Vehicle Set: 2
Bushes Per Vehicle Set: 2
Bushes Per Vehicle Set: 1
What Do The Different Grades Mean?
Tow Bar Ball Cover Protective Cap
Bushes Per Vehicle Set: 1
Photos
Fitting Videos
Specifications
The Iveco Daily MK4 (2006–2011) is a common sight in minibus fleets, council transport vehicles, shuttle buses and commercial vans. Designed for durability and heavy loads, these vehicles often operate in demanding stop-start environments.
Over time, the original rubber suspension bushes can degrade, particularly on high-mileage vehicles used for school runs, passenger transport and delivery fleets. Worn bushes can cause excessive suspension movement, knocking noises and uneven tyre wear.
Polybush polyurethane suspension bushes provide a high-quality upgrade over factory rubber components. Engineered for durability, Polybush bushes deliver improved suspension stability, longer service life and reduced maintenance frequency.
For fleet operators maintaining Iveco Daily MK4 vehicles, Polybush bushes provide a reliable solution for restoring suspension performance and improving long-term durability.
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