Works SUPER
I installed mine about 7000 miles ago. I have checked it and it still seemed rather clean. I just rotated it a little so will not always be sucking from the same spot. The instructions did say to modify it a little but I did not need to that. It comes without a plug at both ends. They recommend that you some how plug the end that goes up against the back of the air box. I tested mine and it seemed to seal rather well so I didn't do that. I just make sure that it is secure in there. I forget the exact part number but S1525 rings a bell in my head. I had to call the company directly to get the part number, it wasn't listed anywhere online. I have no complaints about having Amsoil for an air filter. Hope this helps.