ive seen this around so what does ISB mean anyway ?? thanks guys,scott

 

What's a Powerjoke?<br>What's a Duramax?<br>What's a Vortec?<br>What's a Triton?<br>What's a Magnum?<br><br>Nah, I'm just giving you a bad time.<br><br>I believe it stands for Interact System B5.9<br><br>By the way, the Interact System is just Cummins name for their electronic and fuel injection system on the engine.<br><br>Justin.