Auto Racing Products 12-Point Chromoly Bolt Kit — 8mm x 1.25 x 85mm Universal Fasteners

SKU: BQDN_671-1018
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About Auto Racing Products ARP (Automotive Racing Products) makes the ...Read More

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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

Product Details

Product Description
Part Numbers
Sizing & Fit

About Auto Racing Products

ARP (Automotive Racing Products) makes the strongest fasteners in motorsport — head studs, main studs, rod bolts, and flexplate bolts used by every Formula 1, NHRA, NASCAR, and championship motorsport program. Aerospace-grade alloys, exact-fit machining.

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Premium Hardware for Demanding Applications

For engine builds requiring longer fasteners, the Auto Racing Products 12-point bolt kit offers unmatched strength and precision. Measuring 8mm x 1.25 x 85mm, these bolts are crafted from high-tensile chromoly steel, specifically designed to withstand the extreme pressures and thermal expansion encountered in high-performance engines. These are the go-to choice for builders who refuse to compromise on quality.

Technical Specifications

  • Thread Size: 8mm x 1.25
  • Length: 85mm
  • Head Style: 12mm 12-Point
  • Material: Heat-Treated Chromoly
  • Coating: Black Oxide
  • Quantity: Set of 5

The 12-point head design provides a significant advantage when installing components in tight or recessed areas. The increased surface area for your socket ensures you can achieve precise torque specs without the risk of rounding the bolt head. This is especially beneficial for long-reach applications where consistent clamping force is vital for preventing leaks and maintaining structural integrity. The black oxide finish provides a professional, clean aesthetic while protecting against oxidation.

These fasteners are built to last, providing the peace of mind that your engine components are held together by the best hardware available. Whether you are assembling a custom intake, securing a heavy-duty accessory, or performing a complete engine overhaul, these bolts are up to the task. Elevate your build with the reliability and performance of Auto Racing Products. Find all your automotive hardware needs and more at GGCRACING.

Product Details

Product Description
Part Numbers
Sizing & Fit

About Auto Racing Products

ARP (Automotive Racing Products) makes the strongest fasteners in motorsport — head studs, main studs, rod bolts, and flexplate bolts used by every Formula 1, NHRA, NASCAR, and championship motorsport program. Aerospace-grade alloys, exact-fit machining.

Watch in action

Premium Hardware for Demanding Applications

For engine builds requiring longer fasteners, the Auto Racing Products 12-point bolt kit offers unmatched strength and precision. Measuring 8mm x 1.25 x 85mm, these bolts are crafted from high-tensile chromoly steel, specifically designed to withstand the extreme pressures and thermal expansion encountered in high-performance engines. These are the go-to choice for builders who refuse to compromise on quality.

Technical Specifications

  • Thread Size: 8mm x 1.25
  • Length: 85mm
  • Head Style: 12mm 12-Point
  • Material: Heat-Treated Chromoly
  • Coating: Black Oxide
  • Quantity: Set of 5

The 12-point head design provides a significant advantage when installing components in tight or recessed areas. The increased surface area for your socket ensures you can achieve precise torque specs without the risk of rounding the bolt head. This is especially beneficial for long-reach applications where consistent clamping force is vital for preventing leaks and maintaining structural integrity. The black oxide finish provides a professional, clean aesthetic while protecting against oxidation.

These fasteners are built to last, providing the peace of mind that your engine components are held together by the best hardware available. Whether you are assembling a custom intake, securing a heavy-duty accessory, or performing a complete engine overhaul, these bolts are up to the task. Elevate your build with the reliability and performance of Auto Racing Products. Find all your automotive hardware needs and more at GGCRACING.

Product Details

Product Description

About Auto Racing Products

ARP (Automotive Racing Products) makes the strongest fasteners in motorsport — head studs, main studs, rod bolts, and flexplate bolts used by every Formula 1, NHRA, NASCAR, and championship motorsport program. Aerospace-grade alloys, exact-fit machining.

Watch in action

Premium Hardware for Demanding Applications

For engine builds requiring longer fasteners, the Auto Racing Products 12-point bolt kit offers unmatched strength and precision. Measuring 8mm x 1.25 x 85mm, these bolts are crafted from high-tensile chromoly steel, specifically designed to withstand the extreme pressures and thermal expansion encountered in high-performance engines. These are the go-to choice for builders who refuse to compromise on quality.

Technical Specifications

  • Thread Size: 8mm x 1.25
  • Length: 85mm
  • Head Style: 12mm 12-Point
  • Material: Heat-Treated Chromoly
  • Coating: Black Oxide
  • Quantity: Set of 5

The 12-point head design provides a significant advantage when installing components in tight or recessed areas. The increased surface area for your socket ensures you can achieve precise torque specs without the risk of rounding the bolt head. This is especially beneficial for long-reach applications where consistent clamping force is vital for preventing leaks and maintaining structural integrity. The black oxide finish provides a professional, clean aesthetic while protecting against oxidation.

These fasteners are built to last, providing the peace of mind that your engine components are held together by the best hardware available. Whether you are assembling a custom intake, securing a heavy-duty accessory, or performing a complete engine overhaul, these bolts are up to the task. Elevate your build with the reliability and performance of Auto Racing Products. Find all your automotive hardware needs and more at GGCRACING.

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