FlowTech Full Length Headers 1.5in Primary — Fits 66-91 GM Truck/SUV

SKU: CJWH_31500FLT
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About FlowTech FlowTech engineers high-quality automotive parts and accessories trusted ...Read More

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Sale price$511.95
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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 FlowTech

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

Unleash Power in Your Classic GM Truck

Transform the performance of your 1966-1991 GM full-size truck or SUV with FlowTech Full Length Headers. These headers are designed to provide maximum scavenging, significantly increasing low-end torque and mid-range horsepower. The full-length design is perfect for towing, hauling, or street performance, giving your Small Block Chevy the breathing room it needs to perform at its peak.

Engineered for Performance and Durability

  • 1.5-inch primary tubes for optimized exhaust velocity
  • 3-inch collector for maximum flow efficiency
  • Metallic ceramic coating reduces under-hood temperatures
  • Heavy-duty steel construction for long-term reliability
  • Includes gaskets and hardware for a complete installation

The metallic ceramic coating not only provides a sleek, clean look but also acts as a thermal barrier, keeping heat inside the tubes and away from your engine bay components. This helps protect your starter, spark plug wires, and other sensitive parts from heat soak. These headers are built to withstand the rigors of heavy-duty use while providing a noticeable increase in engine efficiency. Whether you are restoring a classic C10 or upgrading a K5 Blazer, these headers are the perfect foundation for your performance build. Experience the quality and power of FlowTech exhaust systems available now at GGCRACING.

Product Details

Product Description
Part Numbers
Sizing & Fit

About FlowTech

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

Unleash Power in Your Classic GM Truck

Transform the performance of your 1966-1991 GM full-size truck or SUV with FlowTech Full Length Headers. These headers are designed to provide maximum scavenging, significantly increasing low-end torque and mid-range horsepower. The full-length design is perfect for towing, hauling, or street performance, giving your Small Block Chevy the breathing room it needs to perform at its peak.

Engineered for Performance and Durability

  • 1.5-inch primary tubes for optimized exhaust velocity
  • 3-inch collector for maximum flow efficiency
  • Metallic ceramic coating reduces under-hood temperatures
  • Heavy-duty steel construction for long-term reliability
  • Includes gaskets and hardware for a complete installation

The metallic ceramic coating not only provides a sleek, clean look but also acts as a thermal barrier, keeping heat inside the tubes and away from your engine bay components. This helps protect your starter, spark plug wires, and other sensitive parts from heat soak. These headers are built to withstand the rigors of heavy-duty use while providing a noticeable increase in engine efficiency. Whether you are restoring a classic C10 or upgrading a K5 Blazer, these headers are the perfect foundation for your performance build. Experience the quality and power of FlowTech exhaust systems available now at GGCRACING.

Product Details

Product Description

About FlowTech

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

Unleash Power in Your Classic GM Truck

Transform the performance of your 1966-1991 GM full-size truck or SUV with FlowTech Full Length Headers. These headers are designed to provide maximum scavenging, significantly increasing low-end torque and mid-range horsepower. The full-length design is perfect for towing, hauling, or street performance, giving your Small Block Chevy the breathing room it needs to perform at its peak.

Engineered for Performance and Durability

  • 1.5-inch primary tubes for optimized exhaust velocity
  • 3-inch collector for maximum flow efficiency
  • Metallic ceramic coating reduces under-hood temperatures
  • Heavy-duty steel construction for long-term reliability
  • Includes gaskets and hardware for a complete installation

The metallic ceramic coating not only provides a sleek, clean look but also acts as a thermal barrier, keeping heat inside the tubes and away from your engine bay components. This helps protect your starter, spark plug wires, and other sensitive parts from heat soak. These headers are built to withstand the rigors of heavy-duty use while providing a noticeable increase in engine efficiency. Whether you are restoring a classic C10 or upgrading a K5 Blazer, these headers are the perfect foundation for your performance build. Experience the quality and power of FlowTech exhaust systems available now at GGCRACING.

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