am i reading right the progressive kit is one side only the right side or both part num # 10-2004

 

If you're talking about the Progressive stabilizer, yes, it installs on the right side of the swingarm and has a link up to the transmission pan.

 

i am sorry it is for the front it says
The 2002-2005 FLHT/FLT models are equipped with a damper-rod type fork on the right side and a cartridge fork on the left side. The Springs included in this kit have been designed to both be installed in the damper-rod/right fork only, and deliver optimum performance in conjunction with the stock spring in the left fork. No modification to the left fork is required.

 

No one can help

 

was looking at ones for road king

 

There is at least one other thread on HDF, but it didn't tell us much about them. May be worth doing a search.