before the axle turn downs

IMO
what we really need is some fast acting
instant-open/instant-closed, well-sealing, cut-outs, synchronized to the secondary opening or gas-pedal. I would totally buy such a cut-out. And then I could run a small-diameter single exhaust off the side, out to wherever. Cuz I mean really, my blasts are never more than 3 to 4ish seconds on account of I'll be speeding for sure by 5 to 6 seconds; It would be all over by the time electric cutouts could open, and then I'd have to wait for them to close, during which time I'd be a sitting duck to any cop within earshot.

My 3" TTI system weighs 72 pounds, and I gotta drag that brute system around everywhere I go. I would love to quarter that.

Anybody remember the Accell Priority valve? OK, nope, that's not it. I forget what it was called.