Reviewed By C.O. R (Carrizozo, NM) Reviewed for a 2007 Cadillac Escalade —11/22/2007 9:27 AM
Fairly easy to install. No whistle noice of any kind at any RPM. From idle to I will not say what speed, there is a tremendous difference. Gas mileage maybe a little better. If you are looking for more towing poweer or whatever, this is it.