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ARP Bolts ARP GM 1/2 Front Mandrel Bolt 3.750" Underhead Length 8740 Chromoly Natural Finish - 330-0706

If you're diving into some serious engine work or just looking to upgrade your ride, the ARP GM 1/2 Front Mandrel Bolt is a solid choice. Trust me, this isn't just any bolt; it's built to handle the kind of stress that would make lesser fasteners crumble.

First off, let’s talk about the material. This bad boy is made from 8740 chromoly, which is a fancy way of saying it’s tough as nails. You get a yield strength of 190,000 psi, so you know it’s not going to let you down when you’re pushing your engine to the limit. Whether you’re hitting the trails or just cruising the streets, you can count on this bolt to keep everything locked in tight.

Now, the underhead length comes in at 3.750 inches, which is perfect for those applications where you need a bit of extra reach. The diameter is a solid 0.500 inches, and with a thread length of 0.625 inches, it fits snugly into place. You won't be dealing with any stripped threads here.

When it comes to installation, the hex head style makes it easy to get a good grip, and with a wrench diameter of 15/16 inches, you can torque it down without any hassle. Plus, the natural finish means it looks good while doing its job, blending in nicely with your engine bay.

In short, if you want reliability and strength in your build, this ARP bolt is a no-brainer. It’s the kind of part you can trust, and once you’ve got it in, you’ll wonder how you ever went without it. Whether you're a weekend warrior or a full-time gearhead, this bolt's got your back.

Other Part Numbers:
ARP Bolts #arp330-0706

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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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