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ARP 3/8-16 X 4.250 Black Oxide 12pt Chromoly Bolts (5/pkg) - Fasteners with Washers Included - 642-4250

ARP 642-4250 Bolts: The Ultimate Upgrade for Your Engine

If you're serious about your vehicle's performance, the ARP 642-4250 bolts are a must-have. Designed for those who want to ensure their engine components are securely fastened, these bolts are crafted from high-quality materials and built to withstand the rigors of both street and track use.

Fitment

The ARP 642-4250 bolts are compatible with a variety of applications, making them a versatile choice for many engine builds. Whether you're working on a classic muscle car or a modern performance vehicle, these bolts will fit perfectly, providing you with peace of mind during high-stress situations.

Technical Specs

  • Fastener Size: 3/8-16 in. RH
  • Underhead Length: 4.250 in.
  • Fastener Head Style: 12-point
  • Fastener Material: Chromoly
  • Fastener Finish: Black oxide
  • Fastener Grade: ARP Custom 450
  • Fastener Yield Strength: 180,000 psi
  • Wrench Diameter: 3/8 in.
  • Washers Included: Yes

Why Choose ARP 642-4250 Bolts?

These bolts are made from Chromoly steel, which not only provides exceptional strength but also ensures durability under extreme conditions. With a yield strength of 180,000 psi, you can trust that your engine components will remain securely fastened, even under the most demanding driving scenarios.

The black oxide finish not only adds a sleek look but also protects against corrosion, making these bolts a smart investment for any automotive enthusiast. Plus, the included washers ensure a proper seal and distribution of load, further enhancing their reliability.

Customer Feedback

John, a 2021 Ford Mustang GT owner, shared, “I upgraded to the ARP 642-4250 bolts during my engine rebuild, and I couldn’t be happier. They fit perfectly, and I feel confident pushing my car on the track. No issues with loosening, even after multiple runs!”

For those who take their vehicles seriously, the ARP 642-4250 bolts are a key component in ensuring your engine runs smoothly and reliably. Make the smart choice for your 2020 WRX or any compatible model and secure your engine with ARP.

Other Part Numbers:
ARP Bolts #arp642-4250

Proposition 65

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

ARP Bolts Logo

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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