Everybody has opinions, so do I, except that I am the only correct one.
Yes, dual exhaust upgrade is needed before hitting the dyno with highest expectations.
My recommendations: Longtube headers ceramic coated, quality hi-flow cats, stainless steel MAC ProChamber, stainless steel piping & mufflers of choice. Tips of choice.
~Mufflers: Borla XR1Multitube, DR GAS, SpinTech, Flowmaster......
Have Fun With That!! Exhaust choices are the most enjoyable mod!!
'97 3.8L V6
1996 SVT Cobra White