Air woofer yes 3-1/2" pypes stainless. Famous bob here is a vid of one of my passes. I went 9.72 in this vid and it is not my quickest either.
4.10s with 30" 315/60/15 radial on 100% local 93 fuel.
Dodge Dart - 9 Second Motor Only Pass(93 Pump Gas) Radial Tires - YouTube