WOW!!! Put that on my future project list!!!
As far as the noise it appears that he built a partition between the two front seats and the rear engine compartment. It doesn't seem to help much but I bet with some more work they could get it a little quieter (if they wanted)
I love it!!!!

...but how about a SC K24 in there.....no that would be scary. Wait beter yet.... a 1997+ SC NSX engine
