your mufflers are the biggest limit to the volume of sound coming out of the exhaust. You'll want something more like a bullet style muffler if you want something louder. It sounds like you want an MRT style axle back system.
Switching out the resonator will just bring the tone up...not really make things louder. Removing the secondary cats will do more than just play with volume. It also introduces pops (fuel detonating in the exhaust) and may impact rasp on top of volume and tone.
Ditch the flowmaster 44's and put something on that muffles less without bringing in any of the negatives you dont want. That the smartest move if you want to go louder than you are. Just beware, with loud exhaust comes drone. There's no sound deadening in the car so it easily reverberates. You'll want to do the entire rear of the car in sound deadening.
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