I instaled my SPT intake with heat shield today. Im not gonna lie it was alot more complicated than i though but it took me about an hour to put together mostly because i jumped ahead and put the whole intake on without the heat shield and had to take it apart. But anyway you can definately hear a difference i think its the bpv but you can hear a whoosh when u shift. You have to have the radio off but you can def hear it. It cost me $280 and i think it as a pretty good buy. Just wanted to see what everyone thought and show it to anyone who might be thinking about getting this intake.