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ARP 100-1111 Header Bolt Kit Hex Head Stainless Steel 12-Piece

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

100-1111
07/13/2036 5:36 AM
Sale Price

$19.64

In Stock (10+)

delivery box

Usually delivered within 2 days

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No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The ARP 100-1111 is a premium 12-piece header bolt kit featuring hex head bolts designed for secure exhaust header installation. These high-performance fasteners are engineered to withstand the extreme heat and vibration inherent in exhaust applications.

Key Features:

  • Stainless 300 material construction for superior corrosion and heat resistance
  • 170,000 psi tensile strength rating, significantly stronger than Grade 8 hardware
  • Hex head design for reliable installation with standard sockets
  • 12-piece complete kit includes premium-quality washers
  • Black oxide or stainless steel finish options available
  • Ideal for high-temperature exhaust system applications

ARP manufactures these header bolts to exacting standards, ensuring reliable performance in demanding motorsports and street applications. The Stainless 300 material maintains its integrity even under extreme exhaust manifold temperatures, while the superior tensile strength prevents stretching and failure under thermal cycling. Each kit contains the precise number of fasteners needed for your header installation, along with matched washers for proper load distribution.

Products specifications

Fastener Finish

Black oxide

Fastener Material

Steel

Fastener Style

Bolt

Head Style

Hex

Material

Black Oxide

Notes

3/8 in. wrench head size.

Quantity

Sold as a set of 12.

Size

3/8

Thread Size

3/8-16 in.

UHL

1

Underhead Length (in)

1.000 in.

Underhead Length (mm)

25mm

Great value and fast delivery. The tire arrived slightly crushed from weight which possibly occurred during shipping. The out-of-round quickly went away after approximately 20 miles of driving. I'm very impressed with the great price and delivery time. Thanks again.

Great priced and quick delivery. AWESOME!!!!

It was easy but wanted to talk to some one don't see a customer service number that would be helpful

Super easy , great price !

Life savers

Fast shipping, great product.

Bought a Husky gearbox for my Silverado, great price and a great product. Install was simple and the fit was perfect. Gone are the days of opening the rear door and all the items under the seat sliding out. Great for my hitch, tow straps, jumper cables and other miscellaneous must haves in a truck. Great seller the price was the best on the net even with shipping. Item arrived quick and in perfect shape. Thanks!!

Great prices, filled and shipped immediately. Best deal around!

They have the best unbelievable prices and availability on all kinds of automotive products on the market and like I said the prices are great i will buy from here in the future

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great price but the shipping a bit high

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