Removing this Cummins ISX system's emissions hardware commonly called an "ISX delete" is the increasingly common modification for heavy-duty trucks, but it’s very important to understand the implications. https://docs.google.com/document/d/e/2PACX-1vQaLgr02kMlzP6QS80UEc6sr00fBV1w9dphXYRESsHlcVRL5jXd8viaJgSFzLM72wHQkegQURxNZKX0/pub