hi all ever since ive owned my au xr8 it will tick (lifter noise) while cold until oil pressure has got into the lifters i know about that they have done 180 k's thats alright, but once its warm i get a clicking noise exactly like ive pulled a plug lead while its running, but its coming from a black box underneath the passenger side headlight in the engine bay ish

anyone shed any lights it doesnt seem to affect anything but im curious as to what it is

many thanks rob