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ARP Bolts M10 x 1.25 x 30mm Hex Black Oxide Chromoly Fasteners (5/pkg) - 663-1003

Upgrade Your Fasteners with ARP 663-1003 Bolts

If you're looking to enhance the reliability and performance of your engine assembly, the ARP 663-1003 bolts are a must-have for any serious automotive enthusiast. These high-strength fasteners are designed specifically for a range of applications, ensuring a secure fit and maximum durability under pressure.

Fitment

The ARP 663-1003 bolts are compatible with various models that require a robust fastener solution. Specifically, these bolts are ideal for those who demand superior performance and reliability in their builds.

Technical Specs

  • Fastener Size: 10mm x 1.25 RH
  • Underhead Length: 30.00mm
  • Fastener Head Style: Hex head
  • Fastener Material: Chromoly
  • Fastener Finish: Black oxide
  • Fastener Grade: ARP 8740 chrome moly
  • Fastener Yield Strength: 180,000 psi
  • Wrench Diameter: 12mm
  • Washers Included: Yes
  • Quantity: Sold as a set of 5

Why Choose ARP 663-1003 Bolts?

Crafted from high-grade ARP 8740 chrome moly, these bolts offer an impressive yield strength of 180,000 psi, making them perfect for high-performance applications. The black oxide finish not only enhances corrosion resistance but also gives a sleek look that complements any engine bay. Plus, with included washers, you can ensure a tight and secure fit every time.

Customer Feedback

“I installed the ARP 663-1003 bolts on my 2020 Subaru WRX, and the difference was noticeable. The installation was straightforward, and they provide a solid, leak-free seal under pressure. Highly recommend for anyone looking to upgrade their fasteners!”

“As a Ford F-150 owner, I needed something reliable for my engine rebuild. These ARP bolts fit perfectly and have held up under heavy towing conditions. No more worries about fastener failure!”

Whether you're bolting down a new head or securing your intake manifold, the ARP 663-1003 bolts are engineered for performance and peace of mind. Make the smart choice for your vehicle and experience the difference that quality fasteners can make.

Other Part Numbers:
ARP Bolts #arp663-1003

Proposition 65

⚠ 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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