Driveshaft Shop - 2007-2013 BMW M3 Rear Axle Bar / CV *Upgrade Only* || E90/E92/E93

E9X M3 Rear Axle Bar & Inner CV Upgrade

Fits: BMW E90 / E92 / E93 M3

Upgrade your E9X M3's drivetrain with this high-performance rear axle and inner CV upgrade kit, built to handle extreme horsepower levels with aerospace-grade reliability.

Developed using 36-spline aircraft-grade axle bars (compared to the stock 28-spline), this kit includes upgraded Chromoly 108mm inner CVs, custom CV cages and races, and reinforced outer CV internals — all designed to withstand the abuse of high-powered builds up to 1,200 horsepower.

🔧 Key Features:

• Direct replacement 108mm Chromoly inner CVs

• 36-spline high-grade aircraft-quality axle bars

• Upgraded outer CV internals using aerospace-grade components

• Factory-style metal outer CV covers with dual O-ring seals

• Outer CV housings are tempered and shot-peened for enhanced durability

• OEM axles required for modification (you must send them in)

📦 Service Includes:

• Full teardown and reassembly of your OEM axles

• Install upgraded CV internals (both inner and outer)

• Tempering and shot peening of outer housings

• Installation of new 36-spline bars and Chromoly 108mm CVs

• Complete rebuild using race-proven materials and techniques

⚠️ Important Notes:

• OEM axles must be sent in for this upgrade

• Call ahead for RMA number and lead time before shipping

• Rated to 1200HP and includes a 1-year warranty

• Fitment must be confirmed before ordering — Empire Autowerx is not responsible for incorrect part selection

Have a high-powered E9X M3? This axle and CV upgrade is the last stop before the drag strip or the track. Built to take the punishment — and built to last.