Cv Joint, 108mm for 930 Porsche 28 Spline

OVERVIEW

When it comes to building a serious off-road machine, whether it''s a long-travel sand rail, a rugged Baja Bug, or a high-horsepower street Porsche, the CV joint is the critical link that translates raw power into dirt-shredding traction. This EMPI 108mm 930-style CV joint is the industry standard for enthusiasts who refuse to compromise on strength and articulation. Designed to handle the extreme angles associated with long-travel suspension systems, this joint utilizes a massive 108mm (approximately 4-1/4 inch) outside diameter and oversized 0.875-inch internal balls. Unlike standard Beetle or Type 2 joints, the 930 architecture is specifically engineered to withstand the brutal side-loading and high-torque demands of performance engines, making it the go-to choice for builders who are tired of snapping axles or overheating smaller joints during aggressive maneuvers.

The secret to this unit''s longevity and performance lies in its premium construction materials and precision manufacturing. Featuring a high-strength chromoly cage, this CV joint is built to resist the stretching and fracturing that often occurs in stock cast cages when pushed to their limits. The 28-spline inner race is designed to mate perfectly with heavy-duty off-road axles, ensuring a secure, slop-free connection that provides immediate throttle response. Whether you are navigating technical rock sections or launching off a dune, this joint''s ability to operate at higher angles without binding ensures that your suspension can cycle through its full range of motion. At Appletree Automotive, we know that the difference between a podium finish and a long tow back to the pits often comes down to the quality of your drivetrain components, and this 108mm Porsche-style joint delivers the reliability you need.

FITMENT

The gold standard for long-travel rear suspension setups using 930-style trailing arms.

Ideal for Type 1 vehicles converted to 930-style drive flanges and heavy-duty axles.

Direct replacement for 1975 through 1989 930 models.

Frequently used in high-performance conversions (requires 930-style drive flanges and custom axles).

A popular upgrade for off-road builds looking for increased axle articulation.

Used extensively in mid-engine and rear-engine component cars requiring high-torque drivetrain solutions.

SPECS

• Joint Type: 930 Porsche Style
• Outside Diameter: 108mm (4.252 inches)
• Spline Count: 28-Spline Inner Race
• Ball Diameter: 0.875 inches (Heavy Duty)
• Cage Material: High-Strength Chromoly Steel
• Bolt Hole Pattern: 6-Bolt (M10 sized holes)
• Maximum Angle: Up to 25-28 degrees (depending on axle clearancing)
• Inner Race Width: 1.565 inches
• Total Weight: Approximately 4.2 lbs
• Finish: Precision Ground and Polished Internal Surfaces

PRO TIPS

1. Proper Greasing and the ''Burping'' Technique

Never skimp on the quality of your grease when installing 930 CV joints. We recommend using a high-moly, synthetic grease specifically designed for high-temperature and high-pressure applications, such as Redline CV-2. When packing the joint, ensure that grease is forced into every cavity between the balls and the cage. A common mistake is over-filling the boot without allowing air to escape. After installation, use a small screwdriver to gently lift the edge of the boot and ''burp'' out the excess air. This prevents the boot from expanding like a balloon due to heat, which often leads to the boot rubbing against the flange or tearing prematurely during high-speed operation.

2. Fastener Security and Torque Specs

The 930 CV joint uses M10 bolts, which require significant torque to stay seated under the vibration of off-road use. Always use Grade 12.9 socket head cap screws and never reuse old bolts that may have stretched. For the ultimate security, we highly recommend using Schnorr safety washers or Stage 8 locking bolt kits. These prevent the bolts from backing out, which is the leading cause of CV joint failure and subsequent axle damage. Torque your M10 bolts to 35-40 ft-lbs in a cross-pattern, and always re-torque them after your first few hours of drive time to account for any initial settling of the grease or components.

3. Phasing and Clocking for Extreme Travel

If you are using these joints in a long-travel application, it is vital to ''phase'' your axles correctly. This means ensuring that the CV cages and inner races are aligned identically on both ends of the axle shaft