I am currently awaiting delivery of the HKS axle back sports exhaust to mount on my 2006 G35 sedan.
I have already received the mounting bracket, exhaust hanger bolts and rubber exhaust hangers. The question I have is concerning the rubber exhaust hangers and if they are the correct part.
The rubber exhaust hangers that I received from www.everythingg35.com have a part # of INF 20651-7W000 while the part listed in various G35 sedan posts and forums has the following part # INF 20651-AF400. I have left emails with Everything G35.com, Infiniti Parts USA.com and Nissan Parts USA .com and am awaiting a reply. When I entered the part # for the rubber exhaust hangers that I received at Infiniti Parts USA .com and Nissan Parts USA.com, there is not a return on the search. I have attached two photos of the exhaust hangers that I received.

 

Wish I could help you but my 03 hangers are a bit different and my HKS slipped right on with no other additions or modifications. Maybe try phoning everythingg35 tomorrow for a direct answer (if that's who you ordered it from).