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Just wondering what are Internal shock springs? I have never seen them for another car, this is the first time I see something like this. So they go inside the shocks? springs rather then stops? Any one use these? Here is a link:

http://www.losipartshouse.com/servlet/the-21447/LOSA5080-Internal-Shock-Spring/Detail

Yep, you are right !

This is the invention of Jukka Steenari.
He used it in place of the current A or B spacers.
That's looks like a pensil spring.
So you put it on the shock shaft between the E clips under the piston and the cartridge.