Having
Nismo Cold Air Intake
Motordyne 5/16" Basic Plenum Spacer
Motordyne MREV 2 Manifold
Motordyne V1
XYZ with Straight pipe module
Fast intentions Test pipes
Stillen Headers

Would i experience any drone or rasp in high rpms?

 

Nope all quality parts it might drone a tad, but should't rasp and sound deep and dope. Quality parts you listed there, you're thinking the right way.

 

quality parts, shouldn't have any probs with rasp
But CAI and headers really won't make any diff in power, save ur money.
Headers are a huge PITA to install on the G coupes with very minimal gains.
And ur better of with a z-tube and revup airbox instead of cai.

 

I don't think you have to worry about rasp, but I think there will be some drone on the highway. I'd be prepared for it to be loud as %#$! when you get on it as well.

 

When I installed test pipes with my hks it was so raspy I took them right off.

 

they are resonated test pipes if that helps