WHB Porsche

Plugs into OBDII port and provides digital gauge, scan tool, diagnostic, and data playback features. I've used it about a dozen times, it just sat in the glovebox of my truck.

See here:
http://www.alligatorperformance.com/...le-p-2887.html

Works on the following truck applications:
- Ford 2003+ Powerstrokes and 2004+ F-150s
- Dodge 2006+ Cummins and 2007 Hemi trucks
- Chevy 2006+ Duramax and 2007+ Chevy gas trucks

Was $299 new, will sell for $150 + shipping.