I have a pair of 3" Kooks High Flow cats that I cut out of a hacked up y-pipe that came with a set of Kooks long tube headers I purchased used. I will spin them up in a lathe to remove the remaining 3" tube left over from cutting. This will allow them to slip onto 3" OD tubing for clean welds. Asking $125 shipped OBO.

 

How long are they?

 

They are about 6" in length.

 

Cats are sold!