I was thinking about having a new Y pipe put on and after that instead of one muffler connecting to two exhaust pipe having 2 one for each pipe(thinking flowmaster 40 because I want it to sound better than my magnaflow 14' I currently have) Besides the sound would this be better than what I have now, would that help my low end power or hurt it since mflowmaster has some restriction yet it would still be practicly true dual.
That would not be a y pipe if I understand you correctly. If you go that route, have a H-pipe welded in connecting the two pipes after the collectors. Right around the tranny pan. This equalizes the exhaust flow and produces more power and a broader power curve.. Do not go with anything larger than 2-1/2" pipe unless you plan on forced induction.
Jones MaxFlow 18" muffler swap, Green Performance drop in air filter..