Yes thats an original ls400 under the nsx, I love that LS, build quality is out of this world, they don't make them like that anymore.
As for mods on my nsx, KW v3, so i can raise the car at least 1/2 inch. I have advan rz-df wheels for it and i have stoptech trophy series brakes front and rear, with the e-brake calipers. However I am not sure i'll install the big brake kits because i think it looks good stock.
- - - Updated - - -
2 years ago i saw a 1996 993 c4s polar silver with lipstick red interior 23thousand km's canadian car two owners, $69,900.00 I did have the money, i am still pissed today about it. The truth is, i didn't have the money. If i knew they were going to sky rocket in price, i would of taken out money against my home. The same thing is happening with nsx's they are going up in price and i didn't want to be priced out of the market for the second time.