is there any way of changing the air spring into a coil in a rockshox revalation 130 2008 without changing the whole fork, or make is as acive as coil

I can’t answer your question entirely but normally if your fork can be switched to coil the process is not reversible as th coil lightly scratches the inside of the Stantions. If you wanted to reverse the process they would leak air. Would be worth speaking to TFtuned they would give you a definite answer

thanks ill contact them

Look up the archived spare parts list on the SRAM website I think answer is yes if you order the correct coil, top cap and lower rod bit.

yep can be done. Relatively easy too.