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ARP 400-1207 Exhaust Header Bolt Kit Stainless Steel 3/8" 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

400-1207
07/13/2036 12:18 AM
Sale Price

$20.23

In Stock (5)

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

ARP's premium grade header bolt kit is an excellent choice to facilitate the installation of your vehicle's exhaust headers. To maintain a reputation for "zero defects", ensure optimum quality control, and produce fasteners of exceptionally high quality, ARP controls all aspects of the manufacturing process, performing all operations in-house where they can be closely monitored. ARP takes extraordinary steps to produce the very finest products of their kind on the market today. Manufactured from ARP's proprietary steel alloy "Stainless 300" and polished to produce a beautiful finish, these components are tolerant of heat, virtually impervious to rust and corrosion, and they are rated at 170,000 psi tensile strength, which is substantially stronger than Grade 8 hardware. The 3/8" diameter bolts are a compact 12-point style that are great for tight, hard-to-reach areas, have a .750 under head length, and the 12 piece set includes premium-quality washers.

  • Heads are compact 12-point style, and premium-quality washers are included
  • Manufactured from polished Stainless 300 steel, a proprietary alloy that is impervious to rust and corrosion
  • Bolts are 3/8" in diameter and have a .750 under head length; 12 pieces
  • Rated at 170,000 PSI, which is considerably stronger than Grade 8 hardware
  • Premium grade bolt kit to facilitate installation of exhaust headers

Products specifications

Fastener Finish

Polished

Fastener Material

Stainless steel

Fastener Style

Bolt

Head Style

12-point

Notes

Drilled for safety wire. 5/16 in. wrench head size.

Quantity

Sold as a set of 12.

Size

3/8

Thread Size

3/8-16 in.

UHL

0.75

Underhead Length (in)

0.875 in.

Underhead Length (mm)

22mm

Fast shipping, thanks

Great price!!! Quality name brand tire delivered in 2 days. Wow! Look forward to doing business again with them.

Great service

Convenient, hassle-free

very easy and not complicated and no hidden fees. Thanks

One of my items that I ordered arrived in the wrong size. The customer service staff was absolutely fantastic. They sent me return lables and got my new item to me with no problem at all. I will be shopping here again.

Good experience; high shipping costs though.

Delivery faster than expected.

It was easy ordering. Only place that had the part i was looking for. Price was also good

Best price online... happy customers

Great price. No TAX! Free Shipping. Can't see any cons.

Good fast shipping. Easy ordering.

Best prices, lack of info on parts. Well worth my time to research on another site and buy here but still an inconvenience. Had 2 orders with Auto Parts Warehouse that something became out of stock days after my order..

Wow Super fast shipping, right product, no hassle no fuss. just how i like it. good job autoplicity keep it up.

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