Specifications
Part Details:
ARP’s heat-treated 8740 chrome moly wheel studs are a direct upgrade for any WRX or STI running an aggressive wheel and tire setup, track days, or higher power levels that put more lateral load through the wheel mounting system. Rated at 190,000 PSI tensile strength, these studs handle the acceleration shock loads and lateral forces that stock fasteners were never designed for.
This kit replaces the factory studs with cadmium-plated chromoly studs sold in a pack of five, providing a full set for one wheel hub.
Key Features
- Heat-treated 8740 chrome moly construction
- 190,000 PSI tensile strength rating
- Cadmium plated for corrosion resistance and durability
- Sold in packs of 5 (one full hub set)
- Direct upgrade for street, track, and drag applications
Important Installation Notes
- Nuts not included: Confirm lug nut thread engagement is sufficient for the new stud length before installing.
- Installation method: Wheel stud installation requires pressing the factory studs out and the new ARP studs in. A hydraulic press or dedicated stud tool is recommended. Pulling studs in with the lug nut method risks thread or hub damage.
- Quantity needed: A full WRX or STI installation requires four packs (one per wheel).
Recommended Supporting Components
- Lug Nuts – confirm compatible thread engagement when running extended studs.
- Coilovers – owners upgrading suspension geometry often address wheel stud strength at the same time.
- WRX Brake Upgrades – wheel stud upgrades are commonly done alongside brake work since both require pulling the wheels.
Frequently Asked Questions
Do I need ARP wheel studs if I’m running stock wheels?
For street-only builds with stock or light aftermarket wheels and no track use, factory studs are generally sufficient. ARP studs become a priority for owners running aggressive wheel and tire setups, regular track use, or higher power builds where lateral loads exceed factory stud ratings.
How many packs do I need for a full WRX or STI install?
This kit is sold in packs of 5, which covers one wheel hub. A complete installation across all four wheels requires four packs.
Are lug nuts included with this kit?
No. Lug nuts are sold separately. If running extended studs, confirm the lug nuts in use have sufficient thread engagement for the longer stud length before installing.
Can I install ARP wheel studs myself?
Installation requires pressing the factory studs out and the new studs in, which typically requires a hydraulic press or dedicated stud installation tool. For owners without access to this equipment, professional installation is recommended to avoid damaging the stud threads or hub surface.
Why Buy ARP Wheel Studs from Wrench Masters?
Wrench Masters specializes in Subaru WRX and STI performance builds. When you purchase ARP Wheel Studs from us, you get:
- Fast shipping on in-stock hardware components
- Guidance on stud length and lug nut compatibility for your build
- Support for fitment questions across WRX and STI model years
- Access to a full catalog of WRX and STI wheel and suspension upgrades
Wheel studs are easy to overlook but critical to get right on a performance build. The Wrench Masters team can help confirm fitment and quantity needed before you buy.
Shipping
Shipping Options:
WrenchMastersAuto.com ships your performance parts safely, quickly and conveniently nationwide via the most trusted shipping carriers such as: UPS, Fed Ex, USPS, and DHL.
Delivery Times:
- In Stock: 3-7 Business Days
- Custom Orders: 2-6 Weeks, Please Email: [email protected] or Call: 727-565-9808 for Questions.
Enjoy FREE SHIPPING on most orders over $199!
Contact WrenchMasters
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