Review on Denso 453 5001 Cabin Air Filter by Brian Gopalan

Can't say much about the product because when I found out the installation required cutting out standard parts with a razor blade and applying tape for a correct fit I just left the original. 1999 F150. I'm just turning some wrenches and such, but if the instructions say you have to be precise with the razor blade cut (which is under the dash, you'll have to turn it upside down) and the extra insulation or you'll hear how air blowing through space. I've decided to stick with what I have. However, on my new car, the installation is much easier and I will give it a try.