BMW E8X/E9X M3 Differential Swap 3.5" Aluminum One-Piece Driveshaft

Upgrade your 135i or 335i with an E9X M3 differential without the hassle of modifying and welding factory driveshafts together.

Swapping to an M3 differential is a major drivetrain upgrade, providing access to the stronger M3 axle system and factory limited-slip differential. The most difficult part of the conversion is often finding a shop capable of properly shortening, welding, and balancing two OEM driveshafts. Poorly modified factory shafts can be expensive and may still suffer from vibration or alignment issues.

Our 3.5" aluminum one-piece driveshaft provides a stronger, lighter, and completely bolt-in solution. Each shaft is built with billet transmission and differential adapters, a high-quality DANA slip assembly, and heavy-duty 1350-series U-joints designed to handle high-power street, drag, drift, and road-race applications.

No cutting or welding of factory driveshafts is required. Simply bolt the complete assembly into place.

Kit Includes

• 3.5" aluminum one-piece driveshaft
• Billet transmission and M3 differential adapters
• DANA slip assembly
• Heavy-duty 1350-series U-joints
• Free shipping

Built to Order

Each driveshaft is built specifically for your application.

Typical lead time: 2–3 business days

Custom Drivetrain Applications

Running an engine swap, transmission swap, or nonstandard drivetrain combination? Let us know your transmission, differential, and chassis configuration, and we can build a driveshaft to suit your application.