Actually thats incorrect they used the rpm act back then but the epa announced they no longer acknowledge it. That forced a lot of companies to change there business model. There is no loop hole to get around offroad use products now they can not be sold for any vehicle that has a vin since you can no longer turn a production vehicle into a race vehicle legally.well no one seemed to mind breaking the law including the so called establishments and sophisticated individuals until they got called out. That always seems to be the way it goes everyone is all in until they get in trouble and start talking straight like they never did anything wrong. There was no difference in the epa’s standard back then as there is now. It was always illegal oh wait sorry if it was off road purposes only then magically you where compliant. Please.