M3 Diff Swap Driveshaft

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.

The items installed or applied to vehicles are intended strictly for off-road use only and track vehicles. These modifications may not comply with emissions, safety, or environmental regulations required for public road use under Environmental Regulatory Agency (ERA) laws. It is the sole responsibility of the vehicle owner or operator to ensure adherence to all applicable local, state, and federal regulations. Use on public roads may result in legal penalties or vehicle impoundment. Always verify compliance with local authorities before installation.

We get a large number of custom orders and requests everyday, so as a result it is not always possible for us to keep every item in stock at all times in our warehouse. If you require the item urgently please contact our sales team here to check the stock before you make your purchase.

If you're unsure whether a part will fit your vehicle, feel free to contact us here with your inquiry. Our helpful sales team will reach out to confirm if it's the right match for you.

We offer a flat-rate shipping fee across the continental United States. This excludes Alaska, Hawaii, and U.S. territories. For international orders, additional shipping costs will apply. Please contact us for a quote if you are outside the continental U.S.

Also, feel free to also contact us at ColoradoN5X@Gmail.Com for any other questions.

Not all items are covered by warranty. Items including warranty, will clearly state that there is warranty within the product description. Most of these items will be a standard 1-year warranty against manufacture defects. You, the customer, will be responsible for shipping and handling. We will fix/replace that item with a product that is in working condition if you meet the warranty criteria. Please note that you will be allowed ONLY 1 claim within the year for that product. ColoradoN5X is not responsible for any damage caused during the installation of our products.