HKS exhaust installed today, 2 weird things i noticed

[FairladyZ]

First wierd thing i noticed was.

The black shield that is suppose to be removed for this exhaust is no longer there? I have a 2012, and the car was bought brand new from a dealer, it was never messed with. But it didn't have the emissions shield? Someone chime in if they started removing these.

Second, My car no longer wants to rev pass 5k on neutral sitting still. (I just wanted to hear the new exhaust)

When i had my tanabe exhaust i was able to rev pass the 5k limit or atleast thats how i remember it, i rarely revved it so maybe there was always a limiter but i didn't notice. Can someone also chime in on this???