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ARP 250-4201 Cylinder Head Stud Kit 12-Point ARP2000 Pro Series

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

250-4201
07/12/2036 11:16 PM
Sale Price

$683.06

2 left at this price

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Usually delivered within 2 days

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Live-in-stock inventory

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Fitment guaranteed

Fitment guaranteed

Product Details

The ARP 250-4201 Pro Series head stud kit delivers professional-grade fastening performance for high-performance and racing engines. Engineered to exacting tolerances and manufactured from premium materials, this 12-point head stud kit represents the gold standard in cylinder head retention.

Premium ARP2000 Alloy Construction:

Each stud is precision-machined from premium grade 8740 chrome moly steel alloy, rated at 200,000 psi tensile strength?significantly superior to aircraft quality fasteners. ARP's proprietary vertical rack heat-treating process ensures complete and uniform heat penetration throughout each stud, delivering consistent material properties and exceptional strength.

Precision Manufacturing Process:

  • Centerless ground after heat-treat for near-perfect concentricity and straightness
  • Thread rolled after heat-treat for 10x better fatigue strength compared to pre-heat-treat threading
  • Cold-forged construction ensures molecular integrity
  • Exacting tolerances allow cylinder heads and gaskets to align effortlessly during assembly
  • Specially undercut shorter studs equalize stretch for consistent clamping force

Superior Performance Benefits:

  • 12-point head design with reduced wrenching profile for easy access
  • Wide-area flanged head eliminates need for valve train removal during retorquing
  • More accurate and consistent torque loading compared to bolts
  • Studs stretch only on vertical axis, avoiding the twisting forces that affect bolts
  • Helps prevent head gasket failures through optimized clamping force
  • Easier engine assembly with assured proper alignment

Kit Includes:

  • Complete set of ARP2000 Pro Series head studs
  • Hardened parallel-ground washers for even load distribution
  • Premium assembly lubricant

Each stud is stamped with the ARP logo as your assurance of quality. Trusted by professional engine builders across all forms of motorsports, ARP Pro Series head studs meet the company's zero-defect, zero-failure quality standard. Perfect for competition powerplants and serious high-performance street engines where maximum reliability is essential.

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

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