Stage 8 Header Bolt Kit 5/16-18 x 7/8 — GM 3.8L V6 Exhaust Manifold

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SKU: BJHT_6912
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Sale price$70.95 Regular price$74.49
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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.

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Locking Header Bolts for GM 3.8L V6

Exhaust leaks on your GM 3.8L V6 can lead to poor performance, excessive engine bay heat, and annoying ticking sounds. The Stage 8 Header Bolt Kit (5/16-18 x 7/8) is specifically designed to eliminate these issues by providing a secure, vibration-proof connection for your exhaust headers or manifolds. With their patented locking design, these bolts are guaranteed to stay tight, no matter how hard you drive.

Kit Features and Benefits

  • Vehicle Fitment: GM 3.8L V6 engines
  • Specs: 5/16-18 thread, 0.875 inch length
  • Quantity: Set of 12 bolts
  • Design: 6-point hex head with locking clip
  • Material: High-strength nickel-plated steel

The 3.8L V6 engine is a workhorse, but like many engines, it is susceptible to header bolts loosening over time due to thermal expansion. Standard bolts simply cannot handle the stress of high-performance driving. Stage 8 bolts feature a unique locking clip that prevents the bolt from ever backing out. This ensures a perfect seal between the header and the cylinder head, maximizing exhaust flow and preventing gasket failure. This kit includes 12 bolts, providing everything you need for a complete installation. Whether you are restoring a classic or building a performance machine, these locking header bolts are the ultimate insurance policy for your exhaust system. Find all your engine performance upgrades 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

Locking Header Bolts for GM 3.8L V6

Exhaust leaks on your GM 3.8L V6 can lead to poor performance, excessive engine bay heat, and annoying ticking sounds. The Stage 8 Header Bolt Kit (5/16-18 x 7/8) is specifically designed to eliminate these issues by providing a secure, vibration-proof connection for your exhaust headers or manifolds. With their patented locking design, these bolts are guaranteed to stay tight, no matter how hard you drive.

Kit Features and Benefits

  • Vehicle Fitment: GM 3.8L V6 engines
  • Specs: 5/16-18 thread, 0.875 inch length
  • Quantity: Set of 12 bolts
  • Design: 6-point hex head with locking clip
  • Material: High-strength nickel-plated steel

The 3.8L V6 engine is a workhorse, but like many engines, it is susceptible to header bolts loosening over time due to thermal expansion. Standard bolts simply cannot handle the stress of high-performance driving. Stage 8 bolts feature a unique locking clip that prevents the bolt from ever backing out. This ensures a perfect seal between the header and the cylinder head, maximizing exhaust flow and preventing gasket failure. This kit includes 12 bolts, providing everything you need for a complete installation. Whether you are restoring a classic or building a performance machine, these locking header bolts are the ultimate insurance policy for your exhaust system. Find all your engine performance upgrades 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

Locking Header Bolts for GM 3.8L V6

Exhaust leaks on your GM 3.8L V6 can lead to poor performance, excessive engine bay heat, and annoying ticking sounds. The Stage 8 Header Bolt Kit (5/16-18 x 7/8) is specifically designed to eliminate these issues by providing a secure, vibration-proof connection for your exhaust headers or manifolds. With their patented locking design, these bolts are guaranteed to stay tight, no matter how hard you drive.

Kit Features and Benefits

  • Vehicle Fitment: GM 3.8L V6 engines
  • Specs: 5/16-18 thread, 0.875 inch length
  • Quantity: Set of 12 bolts
  • Design: 6-point hex head with locking clip
  • Material: High-strength nickel-plated steel

The 3.8L V6 engine is a workhorse, but like many engines, it is susceptible to header bolts loosening over time due to thermal expansion. Standard bolts simply cannot handle the stress of high-performance driving. Stage 8 bolts feature a unique locking clip that prevents the bolt from ever backing out. This ensures a perfect seal between the header and the cylinder head, maximizing exhaust flow and preventing gasket failure. This kit includes 12 bolts, providing everything you need for a complete installation. Whether you are restoring a classic or building a performance machine, these locking header bolts are the ultimate insurance policy for your exhaust system. Find all your engine performance upgrades at GGCRACING.

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