Beyea Exhaust Gasket SBC 18 Degree D-Port Graphite — Small Block Chevy Header Gaskets

SKU: GBSK_HG18C
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About Beyea Beyea engineers high-quality automotive parts and accessories trusted ...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 Beyea

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

Premium Performance Exhaust Sealing

Ensure your Small Block Chevy engine performs at its peak with these high-quality Beyea exhaust gaskets. Designed specifically for 18-degree cylinder heads, these gaskets feature a precision-cut 1.830 x 1.710 inch D-port configuration to match high-flow exhaust ports perfectly. Constructed from premium graphite material, they offer superior heat resistance and conform to irregular surfaces, providing an airtight seal that prevents exhaust leaks and maintains optimal backpressure.

Why Choose Beyea Graphite Gaskets?

  • Precision-fit 1.830 x 1.710 inch D-port dimensions
  • High-temperature graphite composition for durability
  • Designed specifically for SBC 18-degree head applications
  • Sold as a pair for complete engine coverage
  • Resists thermal expansion and contraction

Whether you are building a race engine or upgrading your street machine, these gaskets provide the reliability required for high-output environments. The graphite material is engineered to withstand the extreme heat cycling common in performance racing, ensuring your header bolts stay tight and your engine bay stays clean. Trust your build to the professional-grade components found at GGCRACING.

Product Details

Product Description
Part Numbers
Sizing & Fit

About Beyea

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

Premium Performance Exhaust Sealing

Ensure your Small Block Chevy engine performs at its peak with these high-quality Beyea exhaust gaskets. Designed specifically for 18-degree cylinder heads, these gaskets feature a precision-cut 1.830 x 1.710 inch D-port configuration to match high-flow exhaust ports perfectly. Constructed from premium graphite material, they offer superior heat resistance and conform to irregular surfaces, providing an airtight seal that prevents exhaust leaks and maintains optimal backpressure.

Why Choose Beyea Graphite Gaskets?

  • Precision-fit 1.830 x 1.710 inch D-port dimensions
  • High-temperature graphite composition for durability
  • Designed specifically for SBC 18-degree head applications
  • Sold as a pair for complete engine coverage
  • Resists thermal expansion and contraction

Whether you are building a race engine or upgrading your street machine, these gaskets provide the reliability required for high-output environments. The graphite material is engineered to withstand the extreme heat cycling common in performance racing, ensuring your header bolts stay tight and your engine bay stays clean. Trust your build to the professional-grade components found at GGCRACING.

Product Details

Product Description

About Beyea

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

Premium Performance Exhaust Sealing

Ensure your Small Block Chevy engine performs at its peak with these high-quality Beyea exhaust gaskets. Designed specifically for 18-degree cylinder heads, these gaskets feature a precision-cut 1.830 x 1.710 inch D-port configuration to match high-flow exhaust ports perfectly. Constructed from premium graphite material, they offer superior heat resistance and conform to irregular surfaces, providing an airtight seal that prevents exhaust leaks and maintains optimal backpressure.

Why Choose Beyea Graphite Gaskets?

  • Precision-fit 1.830 x 1.710 inch D-port dimensions
  • High-temperature graphite composition for durability
  • Designed specifically for SBC 18-degree head applications
  • Sold as a pair for complete engine coverage
  • Resists thermal expansion and contraction

Whether you are building a race engine or upgrading your street machine, these gaskets provide the reliability required for high-output environments. The graphite material is engineered to withstand the extreme heat cycling common in performance racing, ensuring your header bolts stay tight and your engine bay stays clean. Trust your build to the professional-grade components found at GGCRACING.

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