I have the AGP direct fit intercooler. I did not cut the bumper cover. It fits, but it pushes the bumper cover out a bit. This damaged the rubber seals around the headlights. I just pulled them off, and run it as is. I do have over heating issues when I push it hard. But I think this is in part due to the lack of airflow to the radiator. Because there is no gap between the top of the intercooler and the bottom of the crash bar foam. It's only been a real issue when I was bedding in my new brakes. Usually, I will push it, then turn on the A/C, spray the radiator (what I can reach) and intercooler and let it sit for a few minutes. It should be noted that I'm running E85, but I haven't had any slow cooldown issues other than the brake bedding incident.