You might find more info posting and searching in the Suspension section of the LS430/400 Forum rather than here in the general area.
2009 Ford F-150 King Ranch
2004 Lexus LS430 Custom Lux w/Smart Access - SOLD in 2009
2005 Honda Odyssey Touring R&N
2001 Acura MDX Touring Navigation - SOLD in 2005
1998 Lexus GS300 - SOLD in 2004