Today I got my 98 I30 inspected with my mods listed in my sig{stock cat}, I got the following results,

Results.....Limit
HC GPM:1.99...2.25
CO GPM:10.67..23.74

Here are the #'s I got with my 95 max which had the same exaust system+ a RT cat and Intake.

Results......Limit
HC GPM 1.51 ..2.25
CO GPM .55 ...0.55

As you can see my 95 Maxima did about 20 times better then my 98 I30T. The only difference between the 2 cars{mod wise} is my 98 I30 has a SC and has a Stock Cat.
So I think it is safe to say my 95 max did so mutch better then my I30 because of the RT{RT=Good emissions}. My I30 may have emmited more pollution because of the SC but I believe the results are from a Idle and my SC should not have effected that.