[quote=jonnyjapanese;39323]Ok for starters which of these is right for the front trailing arms SPF1483K or SPF1009K?
QUOTE]
Neither going by their websites description, I'm sure I measured mine (as I've have a mix of S12 and S13 arms and learnt the hard way there were two sizes of bushes).
S12's and early S13's are stepped to 31.6(ish)mm, later S13 are 34(ish)mm.
Edit: Just checked powerflex and they list:
31.6mm
and
35mm
So I wasn't far wrong according to them. I have fitted powerflex bushes to the front arms of an S12 (and still have them sat in the garage).