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ARP Bolts 5/16-24 X 1.250 Black Hex Water Pump Pulley Stud Kit, 1/2 Hex, 1/8 Allen - 100-3201

If you’re diving into the world of diesel performance, you’ve probably heard of ARP. They’ve been around since '68, and let me tell you, they’ve got fasteners down to a science. These aren’t your run-of-the-mill bolts; we’re talking about head studs, main studs, and driveline bolts that are designed to take a beating. Whether you're pushing your engine to its limits or just want peace of mind, these fasteners are built to handle some serious load without breaking a sweat.

Take the ARP 100-3201 5/16-24 X 1.250 Black Hex Water Pump Pulley Stud Kit, for example. This kit is specifically crafted for those who want to keep their water pump secure and functioning flawlessly. With a socket size of 1/2 hex and 1/8 Allen, you’re set for a straightforward installation. The black hex finish not only looks sharp but also adds a layer of corrosion resistance—perfect for those harsh conditions.

What’s really cool about these studs is their high pre-load capability. This means when you install them, they stretch just right to ensure everything stays tight under pressure. You won’t have to worry about your water pump pulley coming loose, even when you’re pushing your rig to the max. If you’re working on a project that requires reliability, you can’t go wrong with these.

So, if you're serious about your build and want hardware that won’t let you down, this ARP kit is a solid choice. Just make sure you’ve got the right tools handy, and you’ll be set for a smooth installation.

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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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