Holley’s Flowtech Headers are the perfect combination of quality and value. These Small Block Chevy Upright 1-3/4” 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