I wanted only a slight increase in sound in order to not disturb neighbors in the morning or draw too much attention from police. I talked to a technician at Ford Racing who recommended the 5230 GTA mufflers.
I'm please with the sound. It slightly louder than stock. They line up perfectly. And, the 4" tail pipe fills the recess in the valance.
__________________ '06 GT, manual, Satin Silver, lt. grey cloth int., IUP.
MODIFICATIONS - Goodyear F1 GS-D3s; 245/45 on 18x9, 275/40 on 18x10| Progress Technology springs & sway bars| Steeda adj. panhard bar, panhard brace, front control arm brace & bushings| strut tower brace| Tokico D-Spec dampers| CHE adj. LCAs & BMR relocation brackets |drilled & slotted front rotors| C&L intake| BamaChips SCT tune| FRPP 4.10 ring & pinion| Pypes off road H-pipes| FRPP GTA mufflers. |