I have been working on my car a bit lately.
It is common for 02-05 subaru WRXs to smell like gas on cold days. If it gets cold enough it will leak liquid fuel onto the top of the engine which isn’t very safe.
I was one $86 pipe short of being stage 2 so…. Now I’m stage 2. Unfortunately, I ended up needing a new O2 sensor as part of the game so it was about $200, but still a lot less $1800 Cobb’s kit costs.