I have a set of Bilstein for 350z given to me by my friend but i wasn't able to figure which model and specs of this particular coilover. Can someone identify it for me?

 

not coilovers

 

^^^yeah those arent coilovers. It looks like theres a reason he Gave them to you they look beat. Might not even be worth the cost of installing them

 

What you've got is a JDM dealer installed optional Bilstein shock and spring kit. Somewhere on my old hard drive I have the specs. IIRC, the spring rates aren't that high and neither is the valving. I'm not a fan of progressive springs, but otherwise Bilstein makes very good stuff and most after market springs aren't that much stiffer then oem anyhow (sometimes the same, sometimes softer). I would install them, unless your wanting something that is much stiffer.

Can you do me a favor? The rear shocks look kinda thin, if you have a dial caliper can you measure the outside diameter and post what you get?

In any event, they would have value on resale. Either as is, or as cores for revalving. Just don't get to close to the cost to buy new HD shocks if you resell.

 

I would think if Bilstein USA services JDM Bilsteins these may be of value to those running in stock classes and may fetch you some $. If I didn't just buy my car I'd be willing to pick them up and see what Bilstein usa can do with them...

edit: just noticed OP is in Malaysia, this may change things...

 

JDM Bilsteins, the newspaper was a dead give away wasn't it?