Beyea SBC Modified Headers 1-5/8 to 1-3/4 Step Crate — Fits Small Block Chevy IMCA Modified

SKU: GBSK_IDM-604-S1-C
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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.

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High-Performance Beyea SBC Modified Headers

Unlock the full potential of your Small Block Chevy with these premium Beyea Modified Headers. Engineered specifically for IMCA and UMP Modified racing, these headers feature a stepped primary design starting at 1-5/8 inches and expanding to 1-3/4 inches. This configuration is optimized to increase exhaust scavenging, providing a broader torque curve and improved throttle response on the track.

Technical Specifications

  • Application: Small Block Chevy (SBC)
  • Primary Size: 1-5/8 to 1-3/4 inch stepped
  • Collector Diameter: 3 inches
  • Material: High-quality steel
  • Finish: Durable black paint
  • Configuration: Pair

These headers are built to withstand the rigors of competitive racing. The 3-inch collector ensures efficient exhaust gas evacuation, reducing backpressure and allowing your engine to breathe freely at high RPMs. Whether you are running a crate engine or a custom build, these headers provide the clearance and flow characteristics required for top-tier performance. The robust steel construction ensures long-lasting durability, even under intense heat cycles. Upgrade your exhaust system with these race-proven components from 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.

Watch in action

High-Performance Beyea SBC Modified Headers

Unlock the full potential of your Small Block Chevy with these premium Beyea Modified Headers. Engineered specifically for IMCA and UMP Modified racing, these headers feature a stepped primary design starting at 1-5/8 inches and expanding to 1-3/4 inches. This configuration is optimized to increase exhaust scavenging, providing a broader torque curve and improved throttle response on the track.

Technical Specifications

  • Application: Small Block Chevy (SBC)
  • Primary Size: 1-5/8 to 1-3/4 inch stepped
  • Collector Diameter: 3 inches
  • Material: High-quality steel
  • Finish: Durable black paint
  • Configuration: Pair

These headers are built to withstand the rigors of competitive racing. The 3-inch collector ensures efficient exhaust gas evacuation, reducing backpressure and allowing your engine to breathe freely at high RPMs. Whether you are running a crate engine or a custom build, these headers provide the clearance and flow characteristics required for top-tier performance. The robust steel construction ensures long-lasting durability, even under intense heat cycles. Upgrade your exhaust system with these race-proven components from 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.

Watch in action

High-Performance Beyea SBC Modified Headers

Unlock the full potential of your Small Block Chevy with these premium Beyea Modified Headers. Engineered specifically for IMCA and UMP Modified racing, these headers feature a stepped primary design starting at 1-5/8 inches and expanding to 1-3/4 inches. This configuration is optimized to increase exhaust scavenging, providing a broader torque curve and improved throttle response on the track.

Technical Specifications

  • Application: Small Block Chevy (SBC)
  • Primary Size: 1-5/8 to 1-3/4 inch stepped
  • Collector Diameter: 3 inches
  • Material: High-quality steel
  • Finish: Durable black paint
  • Configuration: Pair

These headers are built to withstand the rigors of competitive racing. The 3-inch collector ensures efficient exhaust gas evacuation, reducing backpressure and allowing your engine to breathe freely at high RPMs. Whether you are running a crate engine or a custom build, these headers provide the clearance and flow characteristics required for top-tier performance. The robust steel construction ensures long-lasting durability, even under intense heat cycles. Upgrade your exhaust system with these race-proven components from GGCRACING.

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