Spacer plates do they work? Do they really whistle? I have a 2000 quad 4x4 4.7 with 3:55 gears. I was given a air raid spacer plate from a friend who didnt get to install it on thier own vehicle, so they didn't have a first hand experience with it. I tow a 4,200 lb trailer often during the summer and I am looking for small upgrades or ones that prove to be the best bang for the buck . I installed the air raid cold air induction kit and made a slight difference in gas mileage and torque. Also after cat exhaust .Same question do they work and what is the quietest.
"lifes a Journey..Not a destination".