Okay a friend of my has a supra and its pretty much beefed up id say in the engine department so he says. But my questions is..when he is stopped or rolling he can give the car gas and u can hear his turbos spool up loud and clear also when he changes gears it sounds like the turbos hick up or sputter then kick back in to spooling up. My question is iv never herd a 300 do that. I havent been around many upgraded Z's. So my question is..is it the size of the turbos thats makes the noticable spooling noise or is it something totally different?