T3 Expansion chambers

[kristofrogers]

Neither of these pipes have markings on them so I can't tell if they are anything special. They aren't stock and it looks like they are different makers. Anyone recognize them? Is one better than the other?

144790144791

[just ben]

second appears to be an older dg,the first could almost anything but I had a bill's that looked similar. edit after a closer look its not a dg

[kristofrogers]

bump, anyone recognize these? No stamps or markings for the lose :(