jyoutz
Super Member
Who would enforce that? Local law enforcement aren’t vehicle emissions cops. I wouldn’t chip my Cummins because everyone I know who has done that has had issues with burnt pistons and other engine failures. But hey, go for it if you want to.If the factory warranty was expired I wouldn't hesitate if I was having problems and I would keep my mouth shut and no one would be the wiser, if you tell it some do-gooder will likely rat you out.