Hi! Finding CFM flow data for '60s intakes is tough. Cobra Automotive did offer Extrude Hone on high-rise intakes, so reaching out to them might help. As for published results, most seem to come from individual testing, like dyno runs—specific publications are rare.
Adding: Try checking Mustang or Shelby forums—folks there sometimes share custom test results. Extrude Hone really improves flow consistency, so it's worth exploring. Let us know if you find anything! 😊
Adding: Try checking Mustang or Shelby forums—folks there sometimes share custom test results. Extrude Hone really improves flow consistency, so it's worth exploring. Let us know if you find anything! 😊