My Account
Shopping Cart

ARP 247-4202 Cylinder Head Stud Kit - Pro Series 12-Point 200,000 PSI

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

247-4202
05/31/2036 8:00 PM
Sale Price

$500.23

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 247-4202 Pro Series Cylinder Head Stud Kit delivers professional-grade clamping force and reliability for high-performance and racing engines. These premium head studs are engineered to ARP's exacting standards, providing superior strength and consistent torque loading compared to conventional head bolts.

Pro Series Construction:

  • Premium 8740 chrome moly steel alloy rated at 200,000 PSI tensile strength
  • Vertical rack heat-treatment ensures complete and uniform heat penetration
  • Centerless ground after heat-treat for exceptional concentricity and straightness
  • Threads rolled after heat-treatment for 10x better fatigue strength
  • 12-point head design for precise torque application
  • Undercut short studs equalize stretch for more consistent clamping force

Performance Benefits:

  • Superior clamping force helps prevent head gasket failure
  • Studs stretch only on vertical axis during torquing for more accurate and consistent loads
  • Precise manufacturing tolerances ensure cylinder heads and gaskets align perfectly during assembly
  • Easier engine assembly and servicing compared to head bolts
  • Meets ARP's zero-defect, zero-failure quality standard

What's Included:

  • Complete stud kit for cylinder head installation
  • Hardened parallel-ground washers for even load distribution and accurate torque readings
  • ARP Ultra-Torque fastener assembly lubricant (recommended for proper installation)

Each stud is marked with the ARP logo as your assurance of quality. Professional engine builders across all forms of motorsports rely on ARP Pro Series studs for competition engines where failure is not an option. Remember to re-torque studs after initial engine run-in 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

Notes

Fits 24-valve engines.

Quantity

Sold as a kit.

Washers Included

Yes

Awesome!

Return customer and will continue to be.

able to find old parts for a reasonable price with fast shipping

great

I found what I needed at a reasonable price.

Prices are comparable to other retailers. And they have items in stock that others were saying it would take a month. Fast shipping and great communication. Thank

Autoplicity has the cheapest prices around and fast shipping. I will do business with them again in the future.

Good price, the item was drop-shipped from the manufacture. I ordered it on a Friday and I got an e-mail on tuesday saying it was shipped.

Item arrived promptly (4 days after order), price was good and item was as described.

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