Well I had the infamous crazy missfire on my 03 60k miles, dealer replace 2 coild packs no problem for free of course. I just ordered a K&N fipk kit should be ok. I have heard good things about the kkm but I did not understand how the power increase would be much by keeping 2 stock huge resonators on the intake itself. I notices a difference in power by just removing my resonators and patching the holes with fiberglass worked well but looked like :q:q:q:q, so I just went ahead and ordered the K&N. I am looking foward to installing it. I will also of course put some magnas on it just for sound, I dont want to go overboard sinse this lincoln is my DD and I have a ws6 to have fun in but I might have a little fun 50 shot or something lined up