Depends on the map really, if its generic like revo then it will already be set up for an intake i expect and you can fine adjust with the SPS switch if you run the std filter. I doubt that the original filter is a restriction at stg1 though. I ran stg 1 for years with std filter and was always pleased .
Remember a restriction is going to be right at the top end when the engine cant flow enough air so peak revs. I doubt it would really be noticable on the road as the down pipe will be a restriction at those revs before the inlet i would guess.