version 3&4 coil pack query
 

is there any difference between the two, is there any difference between the sti coil pack and the wrx coil pack and do these coil packs break down slowy or do they just suddenly break down these are the coil packs that sit in the middle of the inlet manifold but i guess you now that any cheers

They are all the same, they generally go slowly, but beware of poor leads (factory ones are usually very good) and bad plugs.

if its starts missing either when cold or hot can be coilpacks

sorrry to hijack but is there a sheet of plastic that fits under the coil pack to stop it shorting out on the inlet