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ARP Bolts ARP Mopar Koffel BTS Head Stud Kit 8740 Chromoly Black Oxide Finish - 145-4012

If you're diving into some serious engine work, you’ll want to check out the ARP Mopar Koffel BTS Head Stud Kit. This isn’t just any head stud kit; it’s built for those who really know their stuff and want to make sure everything stays put under pressure.

  • Fastener Style: Stud – these are designed to handle the heat and pressure, giving you that peace of mind on the track or the street.
  • Undercut Stud: No – this means you get a solid connection without any weak points. Simplicity can be powerful.
  • Head Style: Hex – easy to work with, so you can get those nuts on and off without a hassle.
  • Fastener Material: 8740 chromoly – this stuff is tough. It’s made to withstand high-stress situations, so you know it’s going to hold up.
  • Fastener Finish: Black oxide – not just for looks; this finish helps with corrosion resistance, keeping your build looking sharp and performing well.
  • Washers Included: Yes – you won’t need to hunt down extra parts; everything you need is right here.
  • Cut to Fit: No – these are ready to go right out of the box, so you can get back to what you love: working on your ride.

Whether you’re building a street beast or a track-ready machine, these studs are a solid choice. They’re designed specifically for Mopar applications, so you know they’ll fit right and perform even better. No more worrying about head lift or blown gaskets—these bad boys are here to keep everything locked down tight. Just make sure you follow the torque specs and you’ll be golden.

Other Part Numbers:
ARP Bolts #arp145-4012

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⚠ WARNING: Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov

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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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