Hi everyone. I've got an 02 wrx, catless 3" tbe, snorkel delete with k&n drop in filter, and COBB ap, set on stage 2 93 octane map. Car has aboot 89k miles. Was bone stock one owner wagon with 80k miles when I bought it with maintenance records and all the good stuff. Well when I first got it I put the cobb ap stage 1 tune and cbe on. Then about a week and a half ago I put on an invidia v2 catless downpipe and loaded up the stage 2 tune. Ever since, I've been noticing whitish smoke coming from the tail pipe. Only happens once it is warm and being on a hill facing up seems to intensify it. I know most assume coolant or water with white smoke but it smells like burning oil, no coolant smell whatsoever. Coolant is full and pure green. Oil is normal in coloration and smell, going on 3000 miles since the last oil change and it is just below the E on the dipstick testing it cold. When I first put the downpipe on I heard a whistle that to me didn't sound normal for a turbo spooling, my first thought was a leak, though I did visually inspect the downpipe turbo connection and it looked to be sealed. Any ideas? Does this sound like a head gasket? Or maybe just a pcv valve? Turbo seals? Im scheduled for a compression test Tuesday. Am I taking the right steps?