Auto Racing Products 12-Point Chromoly Bolt Kit — 8mm x 1.25 x 40mm Universal Fasteners

SKU: BQDN_671-1005
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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.

Watch in action

High-Strength Performance Fasteners

When building a high-performance engine, every detail matters, especially the hardware holding it together. The Auto Racing Products 12-point bolt kit is engineered for enthusiasts who demand reliability under extreme stress. These 8mm x 1.25 x 40mm bolts are crafted from premium chromoly steel, offering superior tensile strength compared to standard factory hardware.

Technical Specifications

  • Thread Size: 8mm x 1.25
  • Under-Head Length: 40mm
  • Head Style: 10mm 12-Point
  • Material: High-Tensile Chromoly Steel
  • Finish: Corrosion-Resistant Black Oxide
  • Quantity: Set of 5 Bolts

The 12-point head design allows for higher torque values and easier access in tight engine bays where a standard hex socket might struggle. Whether you are securing intake manifolds, valve covers, or custom brackets, these fasteners provide the clamping force necessary to prevent leaks and structural failure during high-RPM operation. The black oxide finish provides a clean, professional aesthetic while resisting oxidation in harsh automotive environments.

These universal fasteners are a staple for any serious builder looking to replace weak stock hardware with race-proven components. Trust your build to the industry-leading quality of Auto Racing Products. Find the best selection of performance hardware and engine components available today 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

High-Strength Performance Fasteners

When building a high-performance engine, every detail matters, especially the hardware holding it together. The Auto Racing Products 12-point bolt kit is engineered for enthusiasts who demand reliability under extreme stress. These 8mm x 1.25 x 40mm bolts are crafted from premium chromoly steel, offering superior tensile strength compared to standard factory hardware.

Technical Specifications

  • Thread Size: 8mm x 1.25
  • Under-Head Length: 40mm
  • Head Style: 10mm 12-Point
  • Material: High-Tensile Chromoly Steel
  • Finish: Corrosion-Resistant Black Oxide
  • Quantity: Set of 5 Bolts

The 12-point head design allows for higher torque values and easier access in tight engine bays where a standard hex socket might struggle. Whether you are securing intake manifolds, valve covers, or custom brackets, these fasteners provide the clamping force necessary to prevent leaks and structural failure during high-RPM operation. The black oxide finish provides a clean, professional aesthetic while resisting oxidation in harsh automotive environments.

These universal fasteners are a staple for any serious builder looking to replace weak stock hardware with race-proven components. Trust your build to the industry-leading quality of Auto Racing Products. Find the best selection of performance hardware and engine components available today 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

High-Strength Performance Fasteners

When building a high-performance engine, every detail matters, especially the hardware holding it together. The Auto Racing Products 12-point bolt kit is engineered for enthusiasts who demand reliability under extreme stress. These 8mm x 1.25 x 40mm bolts are crafted from premium chromoly steel, offering superior tensile strength compared to standard factory hardware.

Technical Specifications

  • Thread Size: 8mm x 1.25
  • Under-Head Length: 40mm
  • Head Style: 10mm 12-Point
  • Material: High-Tensile Chromoly Steel
  • Finish: Corrosion-Resistant Black Oxide
  • Quantity: Set of 5 Bolts

The 12-point head design allows for higher torque values and easier access in tight engine bays where a standard hex socket might struggle. Whether you are securing intake manifolds, valve covers, or custom brackets, these fasteners provide the clamping force necessary to prevent leaks and structural failure during high-RPM operation. The black oxide finish provides a clean, professional aesthetic while resisting oxidation in harsh automotive environments.

These universal fasteners are a staple for any serious builder looking to replace weak stock hardware with race-proven components. Trust your build to the industry-leading quality of Auto Racing Products. Find the best selection of performance hardware and engine components available today at GGCRACING.

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