down pipe question
on the 94 to '97's the down pipe flattens out like a cobra's head right after the turbo until it reaches the catalytic converter. Does the '99 - '03 7.3's do the same? or are they nice and round like the after market down pipes for the OBS's?
What size is the down pipe? 3 inches? 3.5 inches? And can one go up in size on the down pipe to 3.5 if it is 3" or to 4" if it is 3.5"?
Thank you. just tryin' to bone up on my 7.3's. My truck is the '97 and I know about those, just want to have info when discussions with friends and others come up. Thanks.