ESP off you'll have grinding noise , as for the vibration , there a few threads on that subject here ... Now lay a pic of that avatar big enough so people can see hehe...
07 JEEP SRT8 _ SOLD
Tuned By Johan
12.13 @ 110 N/A Cam & Headers
6.90 @ 101 & 10.93 @ 122 Boosted @ 9lbs