After info I have a 2003 BA XT N/A 6, I am building a new exhaust which consists of Pacemaker extractors, cat, twin 2.5in pipes through to dual inlet dual outlet 2.5in hi flow sports straight through muffler in the center and then over the diff split one pipe either side of car into a 2.5 inch sports muffler either side, hows this combo sound, sorry new to the Falcons with computers etc.