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ARP 434-1102 Header Bolt Kit LS Small Block Chevy M8 x 1.25 12-Pack

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

434-1102
07/13/2036 1:34 AM
Sale Price

$46.29

In Stock (5)

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Usually delivered within 2 days

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Product Details

ARP 434-1102 header bolt kit provides premium-grade fasteners specifically engineered for secure exhaust header installation on GM LS-series small block engines. These precision-manufactured bolts ensure reliable clamping force and resistance to thermal cycling in high-temperature exhaust applications.

Key Features:

  • M8 x 1.25 thread size with 1.181-inch length optimized for LS engine header flanges
  • Hex head design for standard socket installation
  • 170,000 PSI tensile strength rating for superior clamping force
  • Black oxide finish on 8740 chrome moly steel resists corrosion
  • Designed for 1/4-inch wide header flanges common on aftermarket LS headers
  • Complete kit includes 12 bolts with premium washers

This kit fits GM Generation III/IV LS small block engines including LS1, LS2, LS3, LS6, LS7, and variants. ARP's precision manufacturing ensures consistent thread engagement and proper torque retention even under extreme exhaust manifold temperatures. The black oxide coating provides corrosion resistance while the chrome moly construction delivers strength far exceeding OEM fasteners.

Products specifications

Fastener Finish

Polished

Fastener Material

Stainless steel

Fastener Style

Bolt

Head Style

Hex

Quantity

Sold as a set of 12.

Underhead Length (mm)

25.00mm

Can't compete with the prices they offer, saved over $300 on just two tires! Highly recommend to anyone

Great customer service and fast shipping thank you!

very easy ordering

So far so good

AWSOME !!!

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Super fast shipping, great products. will order from again.

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easy

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Quick and easy and nice to have option to use Amazon and Paypal for payment

Very easy

GOOD PRICE

Quick and easy. Hope they have shoes in stock.

Ordered a hard to find in Lagos fuel sender for my 1998 Benz c280 and i had it delivered on time for delayed reapirs. Order #6886

Parts arrived in a timely fashion. Packing could have been better but product arrived safely.

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