Harmonic pulsation / Vibration?????????

Sound IS vibration. While we think of sound as things we hear, sound waves go far above and below what we can hear.
When you are driving on the highway and you get that rhythmic vibe that seems to oscillate at different speeds as you are cruising depending on throttle position....I can't really explain it any better....

Shadango, if you really don't think it's your exhaust then what else is it? I've been through my entire drivetrain with a change to ss springs, spring seat relocation....no change...


Do you think oem manufacturers are just doing all this trick exhaust work for their health? They would not do it if it didn't work and it sure works on my Chrysler.