Auto expectations set mine up. I have a verrry slight whine at 55-60mph but other than that they are great. Noticeable difference. I have not made a pass on them yet. Most likely wont but driving around before I pulled the motor it was a great mod to have.
2006 Chevy Cobalt SS super charged (Daily driver/Gas saver) 1994 Nissan 300zx Twin Turbo (Weekend car) www.SVZA.NET