I have put Centramatics on a pickup truck and a set of balancing beads in another vehicle. Both had similar effects - less vibration at cruising speeds above 55 mph.
Steve, Christy, Anna and Scout (Border Collie)
1994 30'11" Excella - rear twin
2009 Dodge 2500, 6 Speed Auto, CTD, Quad Cab, Short Bed
Hensley with adjustable stinger
WBCCI # 3072
AIR # 6035