Review on 🚫 AEM 21-732C Cold Air Intake System (Not CARB Approved) by Brian Samuel

The AEM cold air intake is very well made. I'm not the smartest, but I was able to install everything in about an hour. I recommend using a small ratchet since a lot of unscrewing takes place in hard-to-reach places. My 2018 WRX had an extra frame that isn't shown in the 2015 manual so those with the newer model just know to reach under that frame. Overall, power has improved with more throttle response, and the torque drop in second gear at 4400 rpm is much less. Power really picks up at 5000rpm. Third gear doesn't feel as powerful, but that's probably because second doesn't pull as hard. I definitely notice a lot of hissing intake gases and additional noise coming from the muffler.