Stage 8 Locking Header Bolt Kit - 3/8-16 x 1-1/4, 12pt (12) — Fits GM V6 / Small Block Chevy

SKU: BJHT_8911B
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Sale price$78.85
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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 Stage 8

Stage 8 engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Stage 8 lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

Enhanced Header Fastening for GM V6 & Small Block Chevy

Achieve superior header security with the Stage 8 Locking Header Bolt Kit, featuring 12-point heads for easier installation in tight spaces. This 12-piece set of 3/8-16 x 1.25-inch bolts is specifically designed for GM V6 and Small Block Chevy engines, offering an advanced solution to prevent header bolts from loosening due to engine heat and vibration. Maintain optimal exhaust sealing and performance.

Precision 12-Point Design & Premium Materials

Each Stage 8 header bolt is precision-machined from high-grade steel and finished with a durable nickel plating. The 12-point head design provides more contact points for your wrench, allowing for easier and more secure tightening, especially in confined engine bays. Coupled with Stage 8's patented locking system, these bolts ensure a steadfast connection, preventing rotation and maintaining consistent clamp load over time.

  • Thread Size: 3/8-16 inch
  • Length: 1.25 inch
  • Head Style: 12-point
  • Material: High-Strength Steel
  • Finish: Nickel Plated
  • Vehicle Fitment: GM V6, Small Block Chevy Engines
  • Quantity: Set of 12 Bolts

The Ultimate Upgrade for SBC/GM V6 Exhaust Systems

For enthusiasts and professionals alike, the integrity of the exhaust manifold seal is paramount. Standard header bolts often fall short, leading to recurring issues. Stage 8's 12-point locking bolts offer a significant performance upgrade, providing a reliable, long-term solution that eliminates exhaust leaks and the need for frequent maintenance. Invest in the best for your GM V6 or Small Block Chevy with GGCRACING.

Product Details

Product Description
Part Numbers
Sizing & Fit

About Stage 8

Stage 8 engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Stage 8 lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

Enhanced Header Fastening for GM V6 & Small Block Chevy

Achieve superior header security with the Stage 8 Locking Header Bolt Kit, featuring 12-point heads for easier installation in tight spaces. This 12-piece set of 3/8-16 x 1.25-inch bolts is specifically designed for GM V6 and Small Block Chevy engines, offering an advanced solution to prevent header bolts from loosening due to engine heat and vibration. Maintain optimal exhaust sealing and performance.

Precision 12-Point Design & Premium Materials

Each Stage 8 header bolt is precision-machined from high-grade steel and finished with a durable nickel plating. The 12-point head design provides more contact points for your wrench, allowing for easier and more secure tightening, especially in confined engine bays. Coupled with Stage 8's patented locking system, these bolts ensure a steadfast connection, preventing rotation and maintaining consistent clamp load over time.

  • Thread Size: 3/8-16 inch
  • Length: 1.25 inch
  • Head Style: 12-point
  • Material: High-Strength Steel
  • Finish: Nickel Plated
  • Vehicle Fitment: GM V6, Small Block Chevy Engines
  • Quantity: Set of 12 Bolts

The Ultimate Upgrade for SBC/GM V6 Exhaust Systems

For enthusiasts and professionals alike, the integrity of the exhaust manifold seal is paramount. Standard header bolts often fall short, leading to recurring issues. Stage 8's 12-point locking bolts offer a significant performance upgrade, providing a reliable, long-term solution that eliminates exhaust leaks and the need for frequent maintenance. Invest in the best for your GM V6 or Small Block Chevy with GGCRACING.

Product Details

Product Description

About Stage 8

Stage 8 engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Stage 8 lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

Enhanced Header Fastening for GM V6 & Small Block Chevy

Achieve superior header security with the Stage 8 Locking Header Bolt Kit, featuring 12-point heads for easier installation in tight spaces. This 12-piece set of 3/8-16 x 1.25-inch bolts is specifically designed for GM V6 and Small Block Chevy engines, offering an advanced solution to prevent header bolts from loosening due to engine heat and vibration. Maintain optimal exhaust sealing and performance.

Precision 12-Point Design & Premium Materials

Each Stage 8 header bolt is precision-machined from high-grade steel and finished with a durable nickel plating. The 12-point head design provides more contact points for your wrench, allowing for easier and more secure tightening, especially in confined engine bays. Coupled with Stage 8's patented locking system, these bolts ensure a steadfast connection, preventing rotation and maintaining consistent clamp load over time.

  • Thread Size: 3/8-16 inch
  • Length: 1.25 inch
  • Head Style: 12-point
  • Material: High-Strength Steel
  • Finish: Nickel Plated
  • Vehicle Fitment: GM V6, Small Block Chevy Engines
  • Quantity: Set of 12 Bolts

The Ultimate Upgrade for SBC/GM V6 Exhaust Systems

For enthusiasts and professionals alike, the integrity of the exhaust manifold seal is paramount. Standard header bolts often fall short, leading to recurring issues. Stage 8's 12-point locking bolts offer a significant performance upgrade, providing a reliable, long-term solution that eliminates exhaust leaks and the need for frequent maintenance. Invest in the best for your GM V6 or Small Block Chevy with GGCRACING.

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