#49845, "RE: I need a measurement for a test pipe!!!!" In response to Reply # 4
16-1/4" from flange end to flange end. Watch out though - the flangese are not at the same angles. One is flat - and the other is at somewhere around 10-20 degrees.
#49887, "RE: I need a measurement for a test pipe!!!!" In response to Reply # 6
mine is almost exactly 16" from flange to flange too. one of the flanges is welded to the end of the pipe, the other end can rotate freely because the very end is "mushroomed" so it can't slip off. i still need to install mine, but everything's all rusted to hell so i'm waiting for the ERT downpipe to be released, i'll get a new cat-back, and put the test pipe in there to hook the two together. yay.