No such thing.

the trackforged piece is certainly nice, but isn't going to provide the gains you'd see with a full on cutout, especially with a stock exhaust behind it.

 

If my exhaust didn't sound good I would go with this. Thankfully I have no drone and a good sound. I've been part of the drone club In the past. My head hated it.

 

I'm in the same boat. I absolutely want to have sex with my T1R exhaust (esp post turbo) but the mufflers are super restrictive, and have already held me away from power @ 450whp.

The boost activated cut out will give me all the high end flow ill need for 700whp, and still sound like pure sex around town/cruising.