REAR Wheel Well Noise - G37 wheel liners?

[markesc]

Okay so I put around 15 sq' of GT Mat Quadro in the back.

It has nicely reduced the exhaust drone, and actually, strangely, has made it sound better from inside the car (FI 18" res cat back).

So it's been about a week now, and there's prettymuch zero reduction in rear wheel well noise. After adding the mat, I can discern exhaust vs. rear wheel well noise a lot easier especially on sections of road that transistion from new/old pavement.

I have a gallon of Second Skin "Spectrum" on the way, will try that along with some 3m mats

Question: I've read around online, and it seems like the Z is basically the same as the G37, but the G has more sound deadening from the factory, including rear wheel well liners (outer/felt lined). Has anyone thought of or attempted to see if they would fit in the Z?