The later Roadsters have the support bracket near the cat deleted (why, to save money probably). Sometimes an over officious tester, when seeing a unused bracket on an aftermarket exhaust, will fail the car on accountnthat the exhaust isn’t secured properly. I just cut the bracket off to save them the confusion.
Roadster parts listings at: http://www.do-da.co.jp/sun-mec/partslist.html