I have the FRPP M-5230-GTAs (same as the Borla #11752), which are not the FRPP M-5230-5GTs (what I believe is often called the stinger and same as the Borla #11750).
With the rest of the system stock, the GTAs sounded just a little louder than stock at idle and a little louder than stock with the throttle open. The nice deep tone was still there. After I added the off road H-pipe the tone remained deep, the rumble became pronounced during engine brake, and the loudness increased significantly.
'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.