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ARP 3/8 x 1.000 Stainless Steel Hex Header Bolt Kit, Set of 12 - 400-1109

If you're diving into a header installation, you know that the right fasteners can make or break your project. I’ve been around the block a few times with my builds, and I can’t stress enough how crucial it is to have reliable hardware. That’s where the ARP 3/8 x 1.000 SS Hex Header Bolt Kit comes into play.

These bolts are not just your run-of-the-mill fasteners. First off, they’re made from stainless steel, which means they’re built to last and resist rust. You can trust them to hold up against the heat and pressure of a performance engine. The polished finish gives them a nice touch, too—because who doesn’t want their engine bay looking sharp?

Now, let’s talk about the specs. Each bolt has a 3/8-16 thread size, which fits snugly into most header applications. The hex head style makes it easy to get a good grip with your wrench, so you can torque them down properly without stripping. With an underhead length of 1.000 inches (or 25.00 mm), they’re just the right size to get the job done without any fuss.

And here’s a little bonus: these come in a set of 12, so you’ll have enough to tackle your headers without scrambling for extras. Trust me, having a few spares is always a good idea when you’re in the thick of a project.

In short, if you’re looking for solid, dependable header bolts that won’t let you down, this ARP kit is a smart choice. They’ve been a game changer for my builds, and I’m sure they’ll do the same for you.

Other Part Numbers:
ARP Bolts #arp400-1109

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⚠ WARNING: Cancer and Reproductive Harm
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The Story Behind ARP Bolts

ARP (Automotive Racing Products) was founded by Gary Holzapfel in 1968 when he noticed his drag-racing friends succumbing to bolt-induced engine failure as a result of poor-quality fasteners. He drew upon his expertise in the aerospace industry to develop a solution, which turned into a successful business nonetheless. 

Since its inception, ARP has been engineering and perfecting a wide range of bolts, studs, nuts, and other fasteners for engines, cylinder heads, headers, wheels, and transmissions. Today, ARP remains the undisputed world leader in automotive fasteners. Racing aficionados everywhere know and recognize the ARP brand and can vouch for its quality.

What Makes ARP Bolts So Special?

Located in Ventura, California, all ARP processes from raw wire to finished fasteners are conducted in-house, right here in the USA. The company continually improves its processes with strict quality control guidelines and is dedicated to producing products that are second to none. Simply put, ARP Bolts are better than the competition because of their quality materials and advanced processes. 

ARP prides itself on using only top-quality materials that are above the usual “aerospace-grade” quality that other manufacturers settle for. For example, while 8740 Chromoly steel has four different grades, ARP only uses the top two, SDF and CHQ. These grades cost twice as much as the lower commercial and aircraft grades, but deliver “zero defect” quality that you can trust each and every time.

ARP Bolts are built to withstand serious racing, possess greater tensile strengths, and can survive higher stress levels than most aircraft fasteners. ARP is dedicated to creating fasteners that boast ultimate strength and durability to ensure they last race after race. Its product lineup ranges from quality high-performance OEM parts to exotic specialty hardware for IndyCar, NASCAR, NHRA drag racing, Formula 1, and even marine applications.

Equip Your Ride with ARP Bolts at Vivid Racing

If you are looking to change the fasteners on your car, you’ve come to the right place. No other brand beats out ARP Bolts in terms of strength, quality, and race-proven success. Vivid Racing is, therefore, proud to carry an extensive lineup of products from American Racing Products like bolts, fluids, sealants, hand tools, stud kits, piston sleeves, wheel bolts, and more! If you have any questions regarding the parts above, please call our specialized sales team at (480) 966-3040.

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