RCS Fox DHX Ti Spring 2.75x400. Inner and outer diameter exactly match the standard Fox DHX spring as far as I can tell. Lots of stories from people online that report RCS spring rubbing the piggyback on the DHX, but I guess they don't have the DHX specific spring.

 You can get it at several webshops ranging from $240 to $280.
Or you have to be lucky to find the exact one you need on Ebay.

 What size of this Ti spring??

 Hi men.whats price this spring?

 do you have fox dhx 0.5?

 No, DHX RC4 2010