What size oil cooler should I fit? Does it matter if its bigger then it should be?

Mine is a 25 row 235mm width cooler and on a hot day on the road or a track day the oil temp can still climb into the 130's.

See if you can get a Setrab cooler too, not Mocal, Setrab are lighter and some suggest more efficient.

Well worth creating small sheilds to force the air through it rather than allowing the air to go round it.

Thanks for the advice!