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If you're diving into a rebuild or just looking to give your AMC 258 6-cylinder a solid upgrade, this ARP head stud kit (part number 112-4001) is a no-brainer. These studs are made from 8740 chromoly, which is a fancy way of saying they’re tough as nails. Seriously, these things can handle some serious torque without flinching.
The head style is hex, so you won’t be fumbling around with weird tools when you’re tightening things down. And yes, they come with washers, so you’ve got everything you need to get started right out of the box. No cutting or fitting required—just bolt them on and you’re good to go.
What’s great about these studs is that they really help with clamping force, which means your head gasket is going to stay sealed, even under stress. That’s crucial if you’re pushing your engine hard or running higher boost levels. Plus, the black oxide finish not only looks slick but also adds a layer of corrosion resistance, which is always a plus in the engine bay.
So, if you want to keep your engine running strong and avoid those pesky blown gaskets, grab this head stud kit. It’s a straightforward upgrade that pays off in reliability and performance.
Other Part Numbers:
ARP Bolts #arp112-4001
Proposition 65
⚠ WARNING:
Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov
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 RacingIf 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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