I did this last week. I dropped mine down about 1-1 1/2" below the air dam. It is barly visable unless you`re really looking for it. I used PVC and then just painted it. You really have to cut your hole in the exact spot, or you`ll need another bend, I wasn`t smart enough to put another bend in mine, so I snipped off a small part of metal that mine was hitting and problem solved. I noticed no performance gains, but I have seen about a 25* drop in EGT`s. That`s enough improvement for me for a $25 mod.