Polyurethane Differential Bushing Kit - 5mm rise - FC3S

An affordable diff bushing kit for the FC3S. 

Kit Includes:

• Ear bushing (2)
• Stop washer (2)
• Front mount (1)

Made completely in house. Constructed of high quality polyurethane and durable powder-coated steel components. This is our 5mm riser kit, which raises the diff 5mm over factory.

The hand TIG-welded front mount is a complete re-design over the OEM mount from Mazda - this mount puts the polyurethane material into compression rather than shear force. Designed to be used with the stock N/A or Turbo II driveline components and their power limits. (Approximately 400hp max for Turbo II diff/trans). 

Great for drift cars, street cars, auto x, you name it. Allowing your drivetrain some room for movement ultimately makes for happier, longer lasting components. These will make your shifts easier with a welded diff, and dampen the shock load on your drivetrain from clutch kicks or burnouts. Ready for some serious abuse!

Compare at around $900 for OEM competition mounts.

Available in 70A, 80A, or 90A hardness polyurethane. For info on polyurethane hardness selection, see our FAQ.

Please note: photos with the kit installed show the older style kit. (2023 - mid 2025)