Flowtech Upright Headers


Small Block Chevy 1-3/4″ or 1-5/8″ Upright Demolition Derby Headers- Natural Finish


Holley’s Flowtech Headers are the perfect combination of quality and value. These Small Block Chevy Upright 1-3/4” or 1-5/8″ tube diameter headers are ideal for even big cubic inch Small Block Chevy engines.
These headers have been dyno tested and proven to increase horsepower!


  • CNC Mandrel-bent tubes provide consistent tubing diameters for smooth flow and increases the cylinder scavenging effect and improves engine breathing
  • Heavy duty 16-gauge 409SS tubing for increased strength and durability
  • 1-5/8” and 1-3/4” tubing diameters available for increased exhaust flow increasing performance and improved throttle response
  • 3” collector for maximum strength and exhaust flow
  • Extra thick header flange for a leak-free seal and maximum strength
  • Welded-in collector merge spears to control exhaust gas re-entry into primary tubes

Additional information

Weight 44 lbs