is this true?

 

I don't think so.
I think some components are the same, but not everything.
I mean, the muffler is different, I know.

 

99 cali spec manifolds and y pipe might be the same, 97-01 have the same cat, but the b pipe and muffler are different for 5th gen. But I would love to know if a 5th gen cat back fits a 4th gen. The only real difference I can think of between 4th and 5th gens that would change the catback is the postion of the lateral link and maybe the legth of the car.

 

the reason i asked is some websites list the greddy evo as 99-03 fitment.

 

When I put the 5th gen muffler on my 4th gen, the inlet for the muffler was on the opposite side.
I don't think the catback from a 5th gen would fit onto the 4th gen straight with no modification.