GPX muffler on a GR...

[ultrakupra]

Ok,so i was checking out some online shops,and all the mufflers/exhaust are made for GPX mivec,just wondering if i can install them o a GR.If not,what can i do to fit a Mivec muffler on my GR?
Thanks in advance,and sorry for posting so many questions.

[ultrakupra]

Ok,so after doing some research i find out that I need a catalyzer↓



...from a GPX(mivec) in order to fit an exhaust that is meant for a GPX on my GR.
Can anyone confirm this before i buy something wrong?

Thanks.