Reading previous reviews I decided to have spacers plated prior to installing, which went very easily, not quite as low as I had hoped so I may move the mounting blocks back an inch further but all in all a good clean fit & look.
I own a 2006 Kawasaki Vulcan with saddle bags and travel trunk and my wife rides with me quite a bit. My factory shocks died completely @ 45,000+ miles. They were adjustable air shocks with adjustments for compression damping also. When I checked with the dealer they told me the shocks would cost $1,000 PLUS installation. That seems like a lot of money for shocks that failed with less than 50K on them. So I bought a pair of 412 Heavy duty shocks for about $263.00 and wow what a difference. My old shocks were 12" and I got 13" instead 'cause the bike is heavy and I carry a lot of stuff and I need the extra preload. The shocks work great and stability with a passenger added was excellent. I highly recommend them for heavy loads like mine.