I installed this air intake system on my 04 V-10 Excursion. Even though it is listed to fit a 99-04 excursion it did not fit my 04 without some extensive modifications. The problem is that the OEM air filter mounting bracket is also part of the evaporative canister bracket on the 04. I had to separate the two brackets by cutting them apart with a skill saw, dremel tool, and a hack saw. Once I separated them I had to make three cuts to the evaporative canister bracket before I had enough clearance to mount the Volant air box to the frame rail next to the evaporative canister and bracket. Once the modification was done (about 2.5 hrs) I was able to continue with the installation, and I was very pleased with results. This filter assembly is replacing an old open K&N filter system that was on the vehicle when I purchased it. I'm very happy to have the air filter enclosed in the box vs out in the dust. Except for the modification to the evaporative canister bracket the installation of the system went well. Very pleased. The only complaint I have is that it wasn't clear when I purchased the intake system that it was not going to fit without some modifications. Definitely won't fit the 04 excursion right out of the box, you will have to do some chopping and modifying.
Purchase was easy. Not too long wait time. A few weeks only. My mechanic installed the intake and it sounds great and performs even better. I can feel the extra horses!
Perfect fit, smoother running since installed.. thanks