Q. I just got HKS HI-Power exhaust on my 370Z

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Hi.
I just installed HKS HI-Power exhaust on my 370Z (manual base model) but the mechanic who installed exhaust on my Z said that he had to took out the heat shield which is located near my rear wheel & round end of my exhaust (the part that FI had carbon fiber) because that end of exhaust part doest fit because of that heat shield thing. Its a black aluminium or metal cover that covers some kinda hose or pipe that can melt by some heat damage. That mechanic guy said it might be okay but hes not sure. So that the mechanic guy said I should find custom heat shield on aftermarket but I never heard that other ppl who installed HKS exhaust on their 370Z had to took out some kinda heat shield.. Is there anyone who installed HKS exhaust on their 370z? if so, do you have same problem as me? did u took the heat shield from your Z either? and where can I find custom heat shield for my Z... I'm kinda confusing..
I could get picture of that heat shield which took out from my car..
I really need help. Please answer my questions.. Thanks.