Beyea SBC Modified Header 1-5/8 602 Crate — Fits IMCA/UMP Northern Sport Mod

SKU: GBSK_IDM602-NSM-G
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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.

Watch in action

Beyea Headers for IMCA/UMP Northern Sport Modified

Dominate the competition with the Beyea SBC Modified Header, specifically designed for IMCA and UMP Northern Sport Modified classes running the 602 Crate engine. These headers are crafted to provide the precise flow characteristics required to extract maximum performance from the 602 crate platform, ensuring you have the power to compete at the front of the field.

Technical Specifications

  • Class Fitment: IMCA / UMP Northern Sport Modified
  • Engine: 602 Crate Small Block Chevy
  • Primary Diameter: 1-5/8 inch
  • Collector Diameter: 2-3/4 inch
  • Chassis Compatibility: GRT Chassis
  • Material: High-Strength Steel
  • Finish: Black Paint

Engineered for the specific demands of modified racing, these headers feature a 1-5/8 inch primary that promotes excellent throttle response and mid-range torque. The 2-3/4 inch collector is optimized for the power profile of the 602 crate engine, providing a balanced exhaust flow that enhances overall engine efficiency. The durable steel construction is finished in a high-quality black paint to resist corrosion and wear. Designed for a perfect fit on GRT chassis, these headers eliminate the guesswork during installation. Whether you are a seasoned veteran or new to the sport modified class, these headers offer the reliability and performance gains necessary to improve your lap times. Equip your race car with top-tier 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

Beyea Headers for IMCA/UMP Northern Sport Modified

Dominate the competition with the Beyea SBC Modified Header, specifically designed for IMCA and UMP Northern Sport Modified classes running the 602 Crate engine. These headers are crafted to provide the precise flow characteristics required to extract maximum performance from the 602 crate platform, ensuring you have the power to compete at the front of the field.

Technical Specifications

  • Class Fitment: IMCA / UMP Northern Sport Modified
  • Engine: 602 Crate Small Block Chevy
  • Primary Diameter: 1-5/8 inch
  • Collector Diameter: 2-3/4 inch
  • Chassis Compatibility: GRT Chassis
  • Material: High-Strength Steel
  • Finish: Black Paint

Engineered for the specific demands of modified racing, these headers feature a 1-5/8 inch primary that promotes excellent throttle response and mid-range torque. The 2-3/4 inch collector is optimized for the power profile of the 602 crate engine, providing a balanced exhaust flow that enhances overall engine efficiency. The durable steel construction is finished in a high-quality black paint to resist corrosion and wear. Designed for a perfect fit on GRT chassis, these headers eliminate the guesswork during installation. Whether you are a seasoned veteran or new to the sport modified class, these headers offer the reliability and performance gains necessary to improve your lap times. Equip your race car with top-tier 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

Beyea Headers for IMCA/UMP Northern Sport Modified

Dominate the competition with the Beyea SBC Modified Header, specifically designed for IMCA and UMP Northern Sport Modified classes running the 602 Crate engine. These headers are crafted to provide the precise flow characteristics required to extract maximum performance from the 602 crate platform, ensuring you have the power to compete at the front of the field.

Technical Specifications

  • Class Fitment: IMCA / UMP Northern Sport Modified
  • Engine: 602 Crate Small Block Chevy
  • Primary Diameter: 1-5/8 inch
  • Collector Diameter: 2-3/4 inch
  • Chassis Compatibility: GRT Chassis
  • Material: High-Strength Steel
  • Finish: Black Paint

Engineered for the specific demands of modified racing, these headers feature a 1-5/8 inch primary that promotes excellent throttle response and mid-range torque. The 2-3/4 inch collector is optimized for the power profile of the 602 crate engine, providing a balanced exhaust flow that enhances overall engine efficiency. The durable steel construction is finished in a high-quality black paint to resist corrosion and wear. Designed for a perfect fit on GRT chassis, these headers eliminate the guesswork during installation. Whether you are a seasoned veteran or new to the sport modified class, these headers offer the reliability and performance gains necessary to improve your lap times. Equip your race car with top-tier components from GGCRACING.

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