the three exhausts I've build have all used these lukey straight through mufflers & sounded tough.
3" on VR4 galant (high 12sec car)
2.5" on TD Hilux
twin 2.5" on VS SS Commode
I'm simply sticking with what I know
Hell, a 2" lukey sounded ok on a farking Excel a mate had, it's gotta sound good on a datto