i was just curious that since lately its been so cold does ur motor sound pretty much totally different then what it sounds like when its warm??? cuz mine sounds absolutely different and i was kinda curious is this normal with the ka’s since this is my first time winter driving this.
the characteristics of the metal piping changes with drop in temperature
plus your engine is much cooler than driving in 30+ degree summers
so yes… it should sound different
it should feel faster also 
mine run’s good and smooth in the winter. i hate the damn snow though! can’t wait for spring…