Join Date: Nov 2006
Location: 30044 Lawrenceville,Georgia..30 miles NNE of Atlanta
Hope this doesn't muddy the waters being that these are aftermarket parts.FWIW,here's a used set of 1600 headers,along with a NOS period correct Faza Daytona front exhaust section for the Alfa Romeo 1300 Veloces. The 1300 Veloce exhaust section measures appx.41mm.ID,46mm.OD.at the collector pipes/flanges. The 1600 collectors measure appx.47mm.ID,50mm.OD. Best I could measure the 1600 tubes at the head was appx.40mm.ID at the long aspect of the oval,no larger.