ARP Rear Extended Wheel Studs For Nissan Skyline R32 GTST GTS-4 GTR 100-7708

ARP Extended Wheel Studs

Perfect for Skyline R32 models.
Some work is required to swap these over, we would reccomend professional installation.
Includes x5 stud, perfect for a 5 stud car, or if you have a 4 stud car you will have a spare stud.
For one car, buy two sets. 

With a tensile strength of 190,000 psi, these heat-treated, cadmium-plated 8740 chrome moly wheel studs are a must for any car in competitive racing or high horsepower applications.

Knurl Diameter: 0.509˝
UHL: 2.500˝
Knurl Length: 0.315˝
Nose Length: 0˝
Diameter - Pitch: M12 x 1.5
Wheel Stud Hole Size - Cast Iron/Steel Hub: 0.493˝ - 0.503˝
Cast Iron/Steel Hub Drill Bit Size (actual dim.): 1/2˝ (0.500˝)
Wheel Stud Hole Size - Aluminum Hub: 0.493˝ - 0.499˝
Aluminum Hub Drill Bit Size (actual dim.): 12.5mm* (0.492˝)

* The nearest standard drill bit is too small. You will need to use an appropriately sized reamer to enlarge the drilled hole until it is within the tolerance for the material.

Installation Guide: Replacing Rear Wheel Studs on Your R32 Skyline

Introduction
Replacing the rear wheel studs on your R32 Skyline GTR, GTST, and GTS4 is a bit more involved compared to some other vehicles. This guide will walk you through the process step by step.

Tools and Equipment Needed:
Socket set
Torque wrench
Axle puller tool (available for rent at auto parts stores)
Ball joint separator (rentable, if needed)
Hammer or press
Replacement ARP studs

Step 1: Preparation
Ensure the car is safely elevated on jack stands and the rear wheels are securely chocked.

Step 2: Disassembly
Remove the rear hub. This involves:

Removing the wheel
Detaching the brake caliper
Disconnecting the e-brake
Removing suspension arms
Detaching the strut/coilover
Loosening the strut bar
Disconnecting the HICAS arm
Refer to the labeled image for guidance on bolt locations.
Do NOT remove your wheel studs until you have your axle out of the hub. You may need them to thread an axle puller onto.

Step 3: Axle Removal (if necessary)
If your axles are seized in the hubs:

Utilize an axle puller tool to remove them. These tools are available for rent at local auto parts stores.

Step 4: handbrake-Brake Removal
Removing/installing the hand-brake might seem daunting but is straightforward. Follow a clear tutorial video for assistance.

Step 5: Hub Separation
With the suspension arms removed, detach the hub from the knuckle by loosening the four large bolts at the back.

Step 6: Wheel Stud Replacement
Once the hub is separated, use a hammer or press to remove the old wheel studs.
Install the new ARP studs into the hubs.

Step 7: Reassembly
Reassemble everything in reverse order.
Ensure all bolts are tightened to the manufacturer's specifications.
Double-check that all components are properly reattached.

Step 8: Final Checks
Lower the car back onto the ground.
Confirm that all connections are secure.
Test the e-brake functionality.
Take the car for a short test drive to ensure everything feels and sounds right.

Congratulations! You've successfully replaced the rear wheel studs on your R32 Skyline. Enjoy the enhanced performance and safety of your new studs.

Wheel Stud Hole Sizes and Proper Interference Fit for the Knurl
ARP OEM replacement wheel studs are designed to press-fit into the original hole in the OEM hub (preferably with a hydraulic press, as using a nut can create problems).

If you are using one of our kits in another application, the hole should be checked to ensure it falls within the correct tolerance to allow for the proper amount of interference, so that the stud won’t spin in the hole. For steel and cast iron hubs, the hole should be 0.006-0.016˝ smaller than the Knurl Diameter. For aluminum hubs, the hole should be 0.010-0.016˝ smaller than the Knurl Diameter. As a courtesy, we have provided the closest standard drill size that will provide a hole in that range.

If the hole is larger than the tolerance listed for the material, then the studs should not be used with that hub. The interfernce fit will not be tight enough and the stud could spin in the hole.

If you need to drill out the holes in your hub, the holes must be kept perpendicular to the face of the hub. If you do not have a fixture that clamps to the hub to guide the drill straight, use a setup similar to the one in the image at below. (A hand drill will not produce satisfactory results.)

All ARP wheel studs have an underhead radius. Each hole must be chamfered 0.025˝ to clear the underhead radius and prevent stud failure.