ok I recently installed the ssautochrome exhaust manifold Thurs. and doing so i also took off the undertray and kept it off. after the install i go and for a lil drive everything is cool. i come back home and go and relax later in the day i take the evo out and go for a cruise with my friend i notice that in 1st and 2nd gear under 20mph i hear and barly feel somthin vibrating under my feet i turn the radio down and hear nothing. i stop again and go and it does the same thing i then go home and jack the car up to see if there was anything under there but find nothing! Anyone know what it could possibly be? is this normal for people who dont have an undertray? My pedals dont vibrate nor does my shifter.

 

anyone!?

 

Your downpipe likely banging on one of the lower crossbars.

 

nope when i looked at it, it wasnt even close

 

dont worry about it. you said you could barely feel it, and it was by your feet. this is most likely the cause of the turbulence under the car, it could be one of the splash guards vibrating around... either way, it is most likely being caused by the removal of the undertray.