Rear caliper interchangeability

[jsukey]

Just wondering if the rear calipers are interchangeable. I need one for my '05 and thought I heard something about them changing somewhere between 2000 and 2006. All help is greatly appreciated!! Thanks

[Sanddraging28]

honda changed the rear caliper in 2005. so you will need a caliper off a 2005-2008 400ex. not sure about the 2009.