I was thinking of trying one, my 04 lly has not overheated but does have that aweful fan engagement when towing above 85degF. I think from what I have read that cooling the air charge should help. the gas air box seals to the inner fender ( ours have that silver tape block) I spoke to my local Stealer and he did the dog and pony show about bringing it in when it happens and they will scan it for codes. I have had a Snap On scanner on it and the Coolant temp doesnt get too high. I think it is just heat rejection from the CAC thats causing the fan to engage.