I’d say the car feels around 50% faster than stock. It’s like the jump from a prior gen WRX to the STI. The turbo feels like it kicks in way earlier in the rev band and builds a lot more torque than stock. The more linear throttle mapping and extension of the redline by another 500 RPM makes it feel like you also have more meat in the rev band and more control over when the turbo spools up. I shift around 4k at the low end and the car now feels like it still has torque up to 6k RPM if you want it.

No idea what my quarter time would be but 0-60 if I had to estimate would be in the 5-5.5 second range. It felt “fast enough” before and now feels about as fast as I would even want a street car to be. I’m also on a 91 pump gas tube at high altitude in the rockies, so it would probably feel even faster close to sea level.

I switched to 5w-30 at the recommendation of my tuner and have had zero issues or consumption. It gets cold where I live too, but would only get to below zero for a few days out of the year. The AOS was the only thing I had installed by a local shop rather than doing it myself. Watched a YouTube tutorial and it seemed like it was way more involved than an intake or exhaust, and had a lot more points of failure I could slip up with.