Dark muffler flow test chart showing Borla 2.5-inch turbo muffle…

Mostly black scan of a muffler flow-test results chart, with only red text legible: a "2 1/2" center inlet/offset outlet Borla turbo" entry rated at 373 cfm and another figure of 521 cfm above it. The rest of the page has gone solid black in the scan.

AI caption July 2011 · Photo 136 of 221