For millions of Americans, regular emissions tests — sometimes called smog tests — are part of vehicle ownership. Thirty-one states and the District of Columbia have at least one county that requires ...

Markets tumble as Trump escalates trade war with 100% tariff on China ‘over and above’ current rates Have I Got News For You’s Euan Blair false claim blamed on ‘digital natives’ Farewell to ‘the ...

Smog laws don't have to prevent you from making horsepower, as long as you use the correct parts, build the engine the right way, and tune it until it delivers a clean exhaust. It is true however, ...