Originally Posted by JAC20
Anyone have problems with what I guess is fender/dash rattle on their cai? It was fine for 3 months now it makes a harmonic rattle only at just over 1k rpms. So basically when you are driving in traffic or on a road with a 30mph speed zone. I took it to ford to see what it was and they said it was the intake vibrating. They were correct and said they fixed the problem but their fix lasted a day. I took off the filter and retightened things and that lasted a day before it came back.
I've contacted bbk and they are stumped as well. I can't find any points of contact so I am stumped.
I actually haven't heard of anyone else have this problem with the 11+ BBK intakes. I do agree that it may be the pins that hold the intake to the fender. Try inserting small pieces of rubber as wedges anywhere this is tight clearances with the fender metal. This should at least help you find the exact spot causing the vibration, just make sure you install one piece at a time, then test.
I'll let you know if I hear of anyone else having this issue and find the route contact causing vibration. Good luck!