Joel,

Yes, the rubber collar (it's like a cup on the top of the spring). I've always heard them referred to as "spring pads", but Fastlane on this site calls them "spring shims". In any event, they come in 8mm, 13mm, 18mm, and 23mm sizes for the front.
So the difference between the largest and smallest is only 15mm (about 5/8"). The variable are 1) What size are your current shims/pads? 2) Would the subtle change provided by shims/pads be sufficient for what you're trying to do? 3) Which way are you trying to go with the front? (up or down)

Jeff Pierce

__________________
Jeff Pierce

Current Vehicles:
'92 Mercedes 190E/2.3 (247K miles/my daily driver)
'93 Volvo 940 Turbo Wagon (263K miles/a family truckster with spunk)
'99 Kawasaki Concours
Gravely 8120
Previous Vehicles:
'85 Jeep CJ-7 w/ Fisher plow (226K miles)'93 Volvo 940 Turbo Wagon
'53 Willys-Overland Pickup
'85 Honda 750F Interceptor
'93 Nissan Quest
'89 Toyota Camry Wagon
'89 Dodge Raider
'81 Honda CB 750F Super Sport
'88 Toyota Celica
'95 Toyota Tacoma
'74 Honda CB 550F