Stage 8

Stage 8 Header Bolt Kit 8mm-1.25 x 25mm Locking 6pt — Fits GM LS-Series Engines

Stage 8 Header Bolt Kit 8mm-1.25 x 25mm Locking 6pt — Fits GM LS-Series Engines
Stage 8 Header Bolt Kit 8mm-1.25 x 25mm Locking 6pt — Fits GM LS-Series Engines
Stage 8 Header Bolt Kit 8mm-1.25 x 25mm Locking 6pt — Fits GM LS-Series Engines
Stage 8 Header Bolt Kit 8mm-1.25 x 25mm Locking 6pt — Fits GM LS-Series Engines
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Stage 8 Header Bolt Kit 8mm-1.25 x 25mm Locking 6pt — Fits GM LS-Series EnginesStage 8 Header Bolt Kit 8mm-1.25 x 25mm Locking 6pt — Fits GM LS-Series EnginesStage 8 Header Bolt Kit 8mm-1.25 x 25mm Locking 6pt — Fits GM LS-Series EnginesStage 8 Header Bolt Kit 8mm-1.25 x 25mm Locking 6pt — Fits GM LS-Series Engines
Stage 8

Stage 8 Header Bolt Kit 8mm-1.25 x 25mm Locking 6pt — Fits GM LS-Series Engines

SKU: BJHT_8900
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$74.35
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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
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Product Details

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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.

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Ultimate Header Security for GM LS Engines

Eliminate the frustration of loose exhaust bolts and blown gaskets with the Stage 8 Locking Header Bolt Kit. Designed specifically for GM LS-Series engines, this set of 12 premium 8mm-1.25 x 25mm 6pt bolts provides a foolproof locking mechanism that prevents thermal expansion and vibration from backing out your fasteners. Whether you are running a street machine or a track-focused build, these nickel-plated steel bolts offer superior durability and heat resistance.

Key Features and Benefits

  • Patented Locking Design: Unique locking system ensures your headers stay tight under extreme heat cycles.
  • Precision Fitment: Engineered specifically for GM LS-Series cylinder heads for a perfect thread engagement.
  • High-Strength Construction: Manufactured from high-grade steel with a corrosion-resistant nickel finish.
  • Complete Kit: Includes 12 bolts, locking tabs, and clips for a hassle-free installation.

Don't let exhaust leaks sap your engine's power or damage your under-hood components. These locking bolts are the gold standard for performance enthusiasts who demand reliability. By utilizing a mechanical lock rather than relying on thread lockers that can fail under high exhaust temperatures, you gain peace of mind during every drive. Upgrade your exhaust system with the best hardware available at 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

Ultimate Header Security for GM LS Engines

Eliminate the frustration of loose exhaust bolts and blown gaskets with the Stage 8 Locking Header Bolt Kit. Designed specifically for GM LS-Series engines, this set of 12 premium 8mm-1.25 x 25mm 6pt bolts provides a foolproof locking mechanism that prevents thermal expansion and vibration from backing out your fasteners. Whether you are running a street machine or a track-focused build, these nickel-plated steel bolts offer superior durability and heat resistance.

Key Features and Benefits

  • Patented Locking Design: Unique locking system ensures your headers stay tight under extreme heat cycles.
  • Precision Fitment: Engineered specifically for GM LS-Series cylinder heads for a perfect thread engagement.
  • High-Strength Construction: Manufactured from high-grade steel with a corrosion-resistant nickel finish.
  • Complete Kit: Includes 12 bolts, locking tabs, and clips for a hassle-free installation.

Don't let exhaust leaks sap your engine's power or damage your under-hood components. These locking bolts are the gold standard for performance enthusiasts who demand reliability. By utilizing a mechanical lock rather than relying on thread lockers that can fail under high exhaust temperatures, you gain peace of mind during every drive. Upgrade your exhaust system with the best hardware available at 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

Ultimate Header Security for GM LS Engines

Eliminate the frustration of loose exhaust bolts and blown gaskets with the Stage 8 Locking Header Bolt Kit. Designed specifically for GM LS-Series engines, this set of 12 premium 8mm-1.25 x 25mm 6pt bolts provides a foolproof locking mechanism that prevents thermal expansion and vibration from backing out your fasteners. Whether you are running a street machine or a track-focused build, these nickel-plated steel bolts offer superior durability and heat resistance.

Key Features and Benefits

  • Patented Locking Design: Unique locking system ensures your headers stay tight under extreme heat cycles.
  • Precision Fitment: Engineered specifically for GM LS-Series cylinder heads for a perfect thread engagement.
  • High-Strength Construction: Manufactured from high-grade steel with a corrosion-resistant nickel finish.
  • Complete Kit: Includes 12 bolts, locking tabs, and clips for a hassle-free installation.

Don't let exhaust leaks sap your engine's power or damage your under-hood components. These locking bolts are the gold standard for performance enthusiasts who demand reliability. By utilizing a mechanical lock rather than relying on thread lockers that can fail under high exhaust temperatures, you gain peace of mind during every drive. Upgrade your exhaust system with the best hardware available at GGCRACING.

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