Your opinion please on a Ypipe variation

I would like to see how the car would run with all the exhaust routed out through the atmospheric pipe, (open headers) and carb/timing adjusted for it. I guess the bottom line is we believe that with the right tuning, an open exhaust will create more horsepower than a restricted exhaust. Is it worth the time to retune? That would be up to the individual to ascertain. But most, if not all, gearheads love the sound of true, open headers. That is something only our design can give, in the basic Y Pipe without unbolting the exhaust.