With a slightly restyled grille, 1975 models were essentially carry-overs from 1974 except that California and certain high-altitude models received catalytic converters and required unleaded gasoline. The 1975 Valiants had several new items available to buyers with increasing interest in fuel economy. These included radial tires and a "Fuel Pacer" system that lit a warning light to tell the driver he was driving uneconomically, as well as Chrysler's A833OD 4-speed manual transmission, the first 4-speed Chrysler had offered with a 6-cylinder engine in the North American market since 1965. There were new spark plugs and batteries and a 'Clincher' warranty that covered everything on the car except trim for 12 months with no mileage restrictions.