Brian,
Not without cutting one end of the pipe off and the cost at that point would be more than new "bullitts".
John...Of course I do! You think I'm old or something

?
If you are using CR's stock exhaust you can -will- gain at least 27 hp. at the wheels and close to 35 lbs of torque. Huge numbers for any type of single, relatively cheap engine upgrade.
John a company called (and located) "Arizona custom exhausts" used to make the side pipe bullitts for me. Kind of like a "cherry bombs" but not. These were steel lined made with innerds packed with burn out proof fiberglass cloth-straight through, no restrictions and actually a little narrower than CR's stock pipes.
A.C.E., sold out and the owner retired.....that's the last I remember/heard of them.
DV