I think they do.

 

There is no in or out. It would not make a difference. The only ones that can be mounted 1 way are the ones with the header flanges on them. I actually had those on a truck and didn't sound all that horrible, not good, but not horrible.

 

I'm not saying your wrong. But the Cherry Bombs i seen have a in and a out. On the inside they got lobs facing the oppsite way the Exhaust flows. Who knows, and who cares. LOL<IMG src=smileys/smiley2.gif border="0"><edited><editID>BLKSTANG9879</editID><editDate>37985.8587847222</editDate></edited>

 

The ones i have used and seen used and not directional, but like ya said, who cares, they suck either way, it's the 70's version of the fart can.

 

Some are directional, and some are not. The Blue Streak ones are as well as some others, but I dont think Cherry Bombs are. Glasspacks are the sh*t for boggin trucks! They drain out easy when you fill them with water!<IMG src=smileys/smiley2.gif border="0">