Well...it's better, but still has a hesitation at 4 to 5 grand when rotating the throttle. I put the 2 brother's back on, it seemed better with the stock bazooka. does that make any sense to y'all? I sure idles a lot better now. Going for avgas tomorrow after the ole grind stone!
You never really answered the original question of if you think it is worse now (with replacement muffler) than before you [originally] replaced the muffler. If the answer is no, then you are probably just feeling the stock lag imposed by the secondary flies. If yes, then I can't say... unless the muffler is somehow defective (more restrictive than stock... being possibly less restrictive doesn't matter much, since you still have the factory pipes, factory cat, factory headers). Of course, there is a complex science to the stuff- the stock entire exhaust system is flow tuned and designed as a unit... replacing only part of it (even if less restrictive) can cause unusual (or at least unpredictable) effects at certain RPM. Or, you have developed some new issue that is unrelated (hence the direction change to fuel, fuel filter, etc).