2.5/3.2 exhaust diameter

[The Radium King]

ok. here's a summary of findings. looking at primaries, OD is:

my 3.2 - 37 mm
ketsa's 2.5 - 35 mm
maxspeed motorsports lists both 34.5 mm and 36 mm on thier website.

is 2 mm (about 1/16") within margin of error and enough to say that they are equal?


looking at the secondary, OD is:

my 3.2 - 39 mm (this was hard to measure, so i used the mid-pipe diameter)
ketsa's 2.5 - 41 mm
maxspeed motorsports lists both 42 mm and 44.5 mm on their website.

here we are looking at a bigger difference - about 4.5 mm or 3/16". Again, close enough to say equal?