I run a DynoMax SuperTurbo. There is nothing raspy at any RPM even with the Cat Removed and a test pipe in its place. All the way up to 4200 RPM there is no Raspyness. At all. 2.25 from the FlexPipe Back and to the muffler and out. Sounds Deep and bassy and is very quiet offroad and at highway speeds.

89'Isuzu Trooper LS 5 spd 2.6L
31" Big O X/T's
15x8 Eagle 058's
K&N Filter w/ Air Box Mod
2.25" DynoMax SuperTurbo
PolyUrathane/Indy4X Bushings
Suspension/ FrontEnd Tech/Hunter Certified Alignment Tech.