Generally speaking, european emissions regulations are much stricter than the standards emplyed by *most* states. The EPA sets some general emission standards for the entire nation (regulating Mercury emissions, which Europe does not regulate) and some other heavy toxins. California and Pennslyvania regulate many other emissions, including visible particulates, allergens, carcinogens, and even noise (although usually noise emissions are restricted by city ordinance, not state law). Europe, on the other hand, has a very easily defined grouped emissions standard: not to exceed certain parts per million emissions of hydrocarbons, carbon monoxides, nitrogen oxides, in addition to visible grit and grime. Interestingly enough, in neither continent are airplane or oceangoing vessel's emissions regulated.
No
They emit high emissions that didn't pass U.S. standards and they can by tuned to go faster than lambos and ferrrari's
This depends entirely on what the smoke stack is venting from. An automobile factory, for instance, produces a different level of emissions than would a barn or a recycling plant.
yes
government
Auto wrecking service is where they crush and scrap the car. Auto salvage service is where they sell the parts from the car
yes
Not on the same car in most places. If they are different cars, sure.
Auto inject is to be used with a self-oil system.
No it all the same. Transmission doe's not matter.
Yes, but the differences are smaller than most people realize.
A few years, and Emissions standards. MEMS3 is remap-able and MEMS2 is not. However MEMS2 gets more gains from Induction and Exhaust mods than MEMS3 does without a map.