Catcher stands for clutch and traction challenger. AKA Marco's ECM or MAD ECM.
Marco is a TDR member that lives in Italy and reflashes the Cummins ECM. He cracked the code and can reprogram the factory part to do inside the ECM what alot of performance boxes do from the outside.
The Catcher doesn't add dyno HP. If you want HP, you need a fueling box, and the Catcher will play with them. What the Catcher does do is improve driveability, turbo spinup and pedal responsiveness.
TDR member Bob Wagner is the conduit to get one. PM or email Bob. There is a Catcher thread on the 24V Engine forum.