The OEM exhausts are very similar; but you can apply the other exhausts on the cars. The GS-Rs cat back can fit. You may have to cut, weld, or mandrel bend some of the piping but it will fit. GReddy, Tanabe, 5Zigen, & HKS makes great powerful exhausts. If your doing this at home you may want to consult with a exhaust shop before you start the process. At least that way you'll have an idea about ground clearances, Performance specs, and fitting requirements. Hope this may enlighten you.