Your opinion please on a Ypipe variation

Replicaracer43, When I used to take my 68 Roadrunner to the drags back in the 70's, I would unbolt the exhaust from the header collectors and roll it up as far as I could then rebolt it with one bolt to give open headers. Then redo everything to go home. I get what your saying, but it seems it would be easier to just use the inserts, plus you have the advantage of blocking off the turbulence from the atmospheric pipe when in street mode. Lastly, if racers did some testing and figured out the best collector length, they could use the y pipe as a collector extention to optimize the torque curve;)