Cv Bolts, for 934 7/16-20 X 2-3/8 12 Point External 6 Pack

OVERVIEW

When you are pushing the limits of your off-road machine, the last thing you want to worry about is a catastrophic failure at the drive flange. These EMPI high-performance 934 CV bolts are engineered to handle the extreme torque and angularity demands of long-travel suspension systems. Designed for the massive 128mm 934-style CV joints, these fasteners are manufactured from hardened aircraft-quality steel to ensure they won''t stretch or shear under the punishing conditions of the dunes or the desert. Whether you are running a high-horsepower turbo engine or a heavy-duty transaxle, these bolts provide the clamping force necessary to keep your axles securely mated to your drive flanges, preventing the dreaded "bolt-out" failures that can end a weekend of racing in an instant.

The 12-point external head design is a critical feature for any serious builder or racer. This configuration allows for a smaller head diameter compared to a standard hex bolt, providing much-needed clearance around the CV boot and the flange housing. Furthermore, the 12-point interface offers superior grip for your socket, significantly reducing the risk of rounding off the heads during high-torque applications or when working in tight, grease-filled spaces. With a 7/16-20 fine thread pitch and a 2 3/8-inch length, these bolts are optimized for standard 934 CV configurations, ensuring deep thread engagement for maximum security. Sold in a convenient 6-pack, these are the professional-grade solution for anyone looking to build a bulletproof drivetrain in their air-cooled VW-based off-road project.

FITMENT

These bolts are designed for custom high-performance applications and are not a direct replacement for stock Volkswagen components. They are specifically intended for vehicles utilizing the 934 (128mm) CV joint conversion. Typical fitment includes:

• Sand Rails & Dune Buggies: Custom chassis using 934 CV joints and 33-spline or 35-spline axles.
• Baja Bugs: Heavily modified Type 1 Sedans equipped with long-travel rear suspension and 934 drive flanges.
• Off-Road Race Cars: Class 1, Class 10, and Class 5 Unlimited vehicles requiring aircraft-grade drivetrain hardware.
• Manx-Style Buggies: High-horsepower street or dirt builds using Porsche-style 934 drivetrain upgrades.
• Custom VW Transaxles: Compatible with Mendeola, Weddle, and Fortin transaxles set up for 934 CV flanges.

SPECS

• Product Type: High-Performance CV Joint Bolts
• CV Joint Compatibility: 934 Style (128mm Outside Diameter)
• Thread Size: 7/16-20 (Fine Thread)
• Under-Head Length: 2 3/8 Inches
• Drive Type: 12-Point External (Requires 12-point socket)
• Material: Hardened Aircraft-Quality Alloy Steel
• Finish: Black Oxide for corrosion resistance and lubrication retention
• Quantity: 6 Pieces per pack (One pack per CV joint)
• Part Number: 16-2414-0

PRO TIPS

PRO TIP 1: Cleanliness is Critical for Torque Accuracy. When installing new 934 CV bolts, ensure that both the internal threads of the drive flange and the external threads of the bolts are completely free of grease. While it is tempting to just "bolt them on," CV grease trapped in the threads can lead to hydraulic lock or inaccurate torque readings. Use a high-quality brake cleaner to degrease the holes and the bolts, then apply a small drop of blue (medium strength) thread locker to ensure they stay put under vibration. Always torque in a star pattern to the manufacturer''s specific torque rating for 7/16-20 aircraft hardware to ensure even clamping pressure across the joint.

PRO TIP 2: Use the Right Tools for the Job. Never attempt to install or remove these bolts using a standard 6-point socket or an ill-fitting wrench. These require a high-quality, thin-wall 12-point socket to properly engage the head. Because 934 joints are often tucked into tight spaces near trailing arms or shocks, using a long extension and a swivel joint can sometimes lead to the socket slipping. Whenever possible, maintain a straight line of force to the bolt head. If you are building a dedicated race car, consider using safety wire if the heads are pre-drilled, though for most recreational sand rails, a properly torqued bolt with thread locker is the standard industry practice.

PRO TIP 3: The "Break-In" Torque Check. New hardware and new CV joints often undergo a "settling" period after the first few miles of hard driving. After your first outing or after about 50 miles of use, we highly recommend getting under the car and re-checking the torque on every single CV bolt. It is common to find that the compression of the CV boot flange or the seating of the joint itself has slightly reduced the initial tension on the bolts. Catching a loose bolt during a routine inspection is much easier and cheaper than replacing a snapped axle or a destroyed drive flange in the middle of the desert.