My Account
Shopping Cart

ARP 208-4302 Head Stud Kit - 8740 Chrome Moly Undercut Studs 12-Point

Manufacturer

ARP

<h3>The Gold Standard in Performance Fasteners</h3> <p>When racing enthusiast Gary Holzapfel recognized that fastener failure was causing many engine breakdowns in 1968, he founded Automotive Racing Products (ARP) to solve a critical problem in motorsports. Drawing on his aerospace fastener manufacturing experience, Holzapfel created a company that would revolutionize the performance fastener industry. Today, ARP stands as the world's premier manufacturer of high-strength bolts, studs, nuts, and specialized hardware for racing and high-performance applications.</p> <p>ARP controls all aspects of the manufacturing process in-house, with all operations closely monitored, enabling the company to maintain its reputation for zero-defect quality. Every fastener undergoes forging, heat treatment, thread rolling, and precision finishing at ARP's Southern California facilities, which span over 115,000 square feet. This vertically integrated approach ensures that each component meets exacting standards for strength, fatigue resistance, and reliability under extreme conditions.</p> <h3>Engineered for Championship Performance</h3> <p>ARP's customer roster reads like a who's who of professional motorsports. The product line ranges from quality high-performance OEM replacement parts to exotic specialty hardware for Formula 1, IndyCar, NASCAR and NHRA drag racing and marine applications. The company's fasteners have secured victories in virtually every major racing championship worldwide, from Top Fuel dragsters to Formula One cars, proving their worth under the most demanding conditions imaginable.</p> <p>The brand's <a href="/48-arp-engine-cylinder-head-bolt-set-10306">engine cylinder head bolt sets</a> represent the cornerstone of ARP's catalog, offering engine builders the clamping force and reliability needed to prevent head gasket failure in high-boost and high-compression applications. These precision-engineered fasteners utilize proprietary materials and heat treatments that deliver up to ten times the fatigue strength of conventional bolts, making them essential for any serious performance build.</p> <p>For engine internals, ARP manufactures <a href="/48-arp-engine-connecting-rod-5276">connecting rods</a> designed to withstand extreme cylinder pressures and high RPM loads. Each rod is manufactured to aerospace standards with tight tolerances and superior material properties. Whether you're building a street performance engine or a full competition powerplant, ARP connecting rods provide the strength and consistency that professional engine builders demand.</p> <h3>Complete Fastener Solutions</h3> <p>Beyond engine components, ARP's product range extends throughout the entire vehicle. The company's <a href="/48-arp-wheel-lug-stud-7680">wheel lug studs</a> offer critical safety and performance benefits for racing and high-performance street applications, providing greater clamping force and durability than factory studs. ARP's product line contains thousands of part numbers and has expanded to include virtually every fastener found in an engine and driveline.</p> <p>Individual <a href="/48-arp-engine-cylinder-head-bolt-5308">engine cylinder head bolts</a> are also available for custom applications or specific replacement needs, manufactured to the same exacting standards as complete sets. This flexibility allows builders to source exactly what they need for specialized builds or repairs without compromising on quality.</p> <p>What sets ARP apart is not just the breadth of their catalog, but their willingness to develop custom solutions for unique applications. The company maintains complete R&D capabilities, including metallurgical research, product design, prototype machining, and extensive laboratory testing. This engineering expertise ensures that whether you're installing a simple head stud kit or building a record-setting race engine, ARP fasteners deliver the reliability and performance that professionals trust.</p>

Part Number

208-4302
05/31/2036 8:00 PM
Sale Price

$173.94

In Stock (10+)

delivery box

Usually delivered within 2 days

free shipping

FREE SHIPPING

Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The ARP 208-4302 is a premium Pro Series head stud kit engineered for high-performance and racing applications. These studs are manufactured from ARP's proprietary 8740 chrome moly steel alloy, heat-treated to an impressive 200,000 psi tensile strength?significantly exceeding aerospace-grade materials and standard Grade 8 fasteners.

Advanced Manufacturing Process:

  • Vertical rack heat-treatment ensures complete and uniform heat penetration throughout each stud
  • Centerless grinding process produces exceptionally straight studs with near-perfect concentricity
  • Thread rolling performed after heat-treat delivers approximately 1000% better fatigue strength compared to pre-heat-treat threading
  • Undercut design on shorter studs equalizes stretch characteristics for more consistent clamping force

Key Features:

  • Premium 8740 chrome moly steel rated at 200,000 psi
  • 12-point nuts with wide-area flanged design for easy retorquing without valve train removal
  • Undercut studs help prevent head gasket failure by compensating for gasket compression
  • Hardened, parallel-ground washers included for even load distribution and accurate torque readings
  • Precision manufacturing ensures perfect alignment of cylinder heads and gaskets during assembly

Why Studs Over Bolts:

Head studs provide superior clamping accuracy because they stretch only on the vertical axis when torqued, unlike bolts which experience both torsional and tensile loads simultaneously. This results in more consistent and reliable torque values, making studs the preferred choice for racing and high-performance engines where frequent disassembly is required. Studs should be installed finger-tight in a relaxed state, with torque applied only to the nut.

Each ARP stud is stamped with the ARP logo as assurance of quality and backed by the company's zero-defect, zero-failure quality standard. Professional engine builders across all forms of motorsports rely on ARP Pro Series head studs for their competition powerplants.

Note: After initial torquing and engine run-in, studs must be re-torqued to compensate for head gasket compression.

Products specifications

Cut to Fit

No

Fastener Finish

Black oxide

Fastener Material

8740 chromemoly

Fastener Style

Stud

Head Style

12-point

Quantity

Sold as a kit.

Washers Included

Yes

Prompt delivery and satisfied experience

great when will it arrive

Good place Better price and cheaper shipping than parts geek

I was impressed by the quality of the product at a great price.

Vary good thank you.

Excellent service and prompt delivery.

nice

good seller, fast delivery. They sent me a email telling me that they had sent the product and gave me the tracking number so i would know when it would arrive. The wheel lock product was listed accuately and fit nicely on my truck. <br>

.............

They had what I needed, No hassle ordering. and it shipped fast.

I found exactly what I was looking for and it was listed for a very awesome price! Matter of fact it was lower than any other store I had found that part on. Shipping was super quick and I will totally shop from Autoplicity again!

No issues at this time with transaction.

Share icon
Return Policy
Returns are easy at Boatplicity

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy