does greddy evo catback for gst fit RS/GS??

[2gBlkGST]

hey im sellin my greddy evo catback for a gst. A guy is interested but has an RS. Will this fit? Someone told me that after the cat, everything is the same from there on back on all rs/gs/gst.. Let me know if it would work. Thanks

 

[Cirus_93TSI]

i dont know if it fits but i hope its a 2.5", if its a 3" he had better have a turbo on that gs because a 3" cat back isnt going to work too well on a non turbo car