[KingLT1]

Corsa NPP...truly mild to wild. Valves closed it is stock like quiet open it screams. Flowmaster NPP is not far behind...also pretty tame when quiet. I only switched from it because of the drone when the valves were open. The Corsa is also much lighter...the Flowmaster is heavy as shit. Don't go by what the box weight says. Haven't heard the S-type in person but from videos it appears to have the lesser amount of difference between open and closed. I heard AWE on a Hellcat it sounded good but was loud AF. Car had catless headers. If I had to guess it's going to be the middle ground between the NPP options. Louder then the NPP stuff when closed, not as loud as NPP exhausts when open.