CV Bolts, 3/8-24 X 2-1/4 12 Point External, 6 Pack

OVERVIEW

When you are pushing massive horsepower through a high-performance off-road transaxle, the last thing you want to worry about is your drivetrain shearing apart at the CV joint. These EMPI 3/8-24 x 2-1/4 inch 12-point external CV bolts are engineered specifically for the demanding environment of 930-style CV joints. Unlike standard metric hardware found on stock Volkswagens, these aircraft-quality hardened bolts provide the superior tensile strength and fatigue resistance required for long-travel sand rails, heavy-duty Baja Bugs, and high-torque racing applications. When you upgrade to 930 CVs, you are moving into a realm where standard hardware simply won''t cut it; you need a fastener that can handle the increased angularity and shock loads inherent in off-road racing and aggressive dune climbing.

The 12-point external head design is a critical feature for any serious builder. This configuration allows for significantly higher torque application and better tool engagement compared to traditional Allen-head or hex-head bolts. In the cramped, greasy quarters of a rear suspension setup, the 12-point design minimizes the risk of stripping or rounding off the bolt head, ensuring you can get a solid "bite" every time you check your torque specs. Sold in a convenient 6-pack, these bolts are designed to fit one complete 930 CV joint flange perfectly. Whether you are building a Mendeola-equipped monster or a rugged woods buggy with 091 Bus boxes and 930 flanges, these EMPI bolts offer the peace of mind that your power is actually reaching the dirt rather than snapping off on the trail.

FITMENT

These bolts are specialized hardware and are NOT intended for stock 8mm or 10mm VW CV applications. They are designed specifically for the following:

• Porsche 930 Style CV Joints: Direct fit for all high-performance 930 (108mm) CV joints.
• Custom Sand Rails: Ideal for mid-engine and rear-engine rails utilizing 930 drivetrain components.
• Baja Bugs: For use with 3x3 or 5x5 trailing arms converted to 930 CV flanges.
• Dune Buggies: Perfect for any Manx-style or tube-frame buggy running upgraded 930 transaxle flanges.
• Off-Road Racing: Suitable for Class 1, Class 5, and Class 10 vehicles requiring 3/8-24 threaded CV hardware.
• Transaxle Compatibility: Fits 002, 091, and aftermarket transaxles (Mendeola, Albins, Weddle) equipped with 930-size drive flanges.

SPECS

• Brand: EMPI
• Part Number: 16-2413-0
• Thread Diameter: 3/8 inch
• Thread Pitch: 24 (Fine Thread / UNF)
• Under-Head Length: 2-1/4 inches
• Head Style: 12-Point External (requires 12-point socket/wrench)
• Material: Hardened Aircraft Quality Alloy Steel
• Quantity: 6 Bolts per pack
• Application: High-performance 930 CV Joints
• Weight: 0.51 lbs per pack

PRO TIPS

1. Clean Threads are Non-Negotiable

Before installing these high-strength bolts, it is absolutely vital that you clean the internal threads of your drive flanges and axle stubs. Use a dedicated thread chaser or a brake cleaner spray with compressed air to remove all old grease, Loctite residue, and grit. If there is grease trapped in the bottom of a blind hole, the bolt can "hydrolock," giving you a false torque reading while leaving the CV joint dangerously loose. For the best results, apply a small drop of Blue (Medium Strength) Loctite to the threads to prevent backing out due to the high-frequency vibrations found in air-cooled drivetrains.

2. Use the Correct 12-Point Socket

Never attempt to tighten these bolts with a standard 6-point socket or an adjustable wrench. To achieve the proper torque without damaging the fastener, you must use a high-quality, thin-wall 12-point socket. Because 930 CV boots can be bulky, a 12-point socket allows for more frequent "re-clocking" of the tool in tight spaces, making the installation process much smoother. Always double-check that the socket is fully seated on the bolt head before applying pressure; if the socket is cocked at an angle, you risk marring the splines of the bolt, which makes future maintenance a nightmare.

3. Torque in a Star Pattern and Re-Check

Properly seating a CV joint requires even pressure across the entire flange. Tighten the 6 bolts in a star pattern (skipping across the center) in three incremental stages until you reach your final torque value (typically 35-45 ft-lbs for 3/8-24 aircraft bolts, but always verify with your specific flange manufacturer). Furthermore, CV bolts are notorious for "settling" after the first few miles of driving. As a master tech rule of thumb, always re-torque your CV bolts after the first 50 miles of operation or after your first hard "shake-down" run in the dunes. This simple step prevents the catastrophic failure of the bolts backing out and shearing under load.