In some markets secondary badging may denote engine size and variations such as trim, wheel, and other options. These badges include GS, GT, SE and FX, although some use FX across the entire range available. In certain markets, certain exterior colors are not available and identification may require noticing subtle local differences such as alloy wheels, spoilers or dealer fit options such as in car entertainment systems. These can all change from year to year and from market to market, so the variation is quite significant. One notable difference is that the 1.6 engine always has a single exhaust on the right hand side, in all markets where it is sold.