Driveshaft Shop - 1200HP Rear Axle Bar / CV Internal *Upgrade Only* || F80/F82/F83

F82 M4 Rear Axle Bar & Inner CV Upgrade (2014+)

Supports up to 1,200 HP | Built-to-Order | OEM Axle Core Required

Upgrade your 2014+ BMW F82 M4’s drivetrain with a bulletproof rear axle solution engineered for extreme performance. This Rear Axle Bar and Inner CV Upgrade is designed to withstand the demands of high-horsepower builds and aggressive driving — whether on the street or the strip.

🔧 Key Features:

• 36-spline aircraft-grade axle bars (OEM is 28-spline)

• 108mm Chromoly inner CV – direct-fit replacement with aerospace-grade internals

• Upgraded outer CV internals housed in OEM-strength outer CV shells

• Tempered and shot-peened outer housings for added durability

• Dual O-ring factory-style metal CV covers for superior sealing

• Custom CV cage and race set for maximum load distribution

• Rated for 1200 HP builds

• 1-Year Limited Warranty included

📦 Build Process & Requirements:

This is a build-to-order upgrade that requires your factory OEM axles to complete the process. Each set is custom-assembled to ensure perfect fit and maximum strength:

1. Call to request an RMA number and confirm lead times

2. Send in your OEM axles

3. We rebuild with:

   • 36-spline high-strength bars

   • Aerospace-grade Chromoly internals

   • Reinforced outer CVs

4. Fully assembled and sealed — no additional modification required

⚠️ Important Notes:

• OEM axles must be sent in – no cores provided

• Lead times vary — call before shipping

• Fitment responsibility lies with the customer; please confirm compatibility before ordering

• Island Racewerks acts as a distributor — all technical issues will be coordinated with DSS

Built for enthusiasts pushing limits, this axle upgrade offers unmatched strength and peace of mind for your F82 M4 — whether you're chasing quarter-mile records or carving up the track.