Are the air filter, oil filter and spark plugs for a WRX [MY97] same as UK spec ?

I'm having some trouble getting hold of the right bits, and would prefer to wander into my local IM dealer and get them over the counter.

Dave,
On MY93 WRX, the oil filter, and the air filter is the same as a UK model, as I changed mine myself. As for the spark plugs, they have been changed by my local dealer, I do not know if they are the same as UK spec (but I`ve got a feeling there is a different kind of plug in the earlier Imprezas like mine.) Hope thats of help,

Proby.