Help identifying rear shocks
 

Hi Everyone,
I just got some used shocks from a fellow pelicanite, but am having trouble identifying them.

The p/n says B46-178 and they have a green body on the bottom with a yellow metal cover (covering the piston) on the top.

Any idea what these are? The Bilstein website doesn't match any p/n's....
http://i13.ebayimg.com/02/i/05/77/ff/e2_1.JPG

p.s. I'm also trying to see if they need rebuilding. They compress and comeback up on their own so there's still gas in them, but they seem to compress more quickly if I press on them harder.
Anyone know a good place in Toronto to get them looked at/rebuilt?

Thanks in advance.

If they are Bilsteins then they can be sent there to be rebuilt. sorry I don't know their East coast phone # but check out WWW.Bilstein.com