Exhaust extractors

[G-ForceCrew]

Hi guys,
I have a TD42 N/A engine black top GQ shorty. I've changed the exhaust from the expansion couplink back to 3''.
Now want to do the front end. Yep i know turbo the thing. I like it nice and stock and drive it every day to work and go off road about 10% of the time.
Has anyone got comments about using TRI-Y extractors over conventional balanaced systems.
I have found with street V8's that TRI-Y's offer more torque than balanced longer systems at lower rev's.
It's doing 1100 rpm on the open road speed limit flat road.
My other TD42 N/A thats in a 7 meter bus has a way different exhaust manifold and way bigger twin pipes off the manifold.

General comment: We dont have to run CATS in NZ and the OZ road worthy is the same as a wof in nz apart from you can get a wof from the local MTA person. Take your rig to a VTNZ to get a wof is the same as over the pits in Oz. If you run a 3500kg tow bar and then tow 3500kg you then need a COF which is over the pits every time (six months unless not 10 years old ) and you need truck licence to be driving it. Heaps of Mums with the big tailers on have had issue's with the blue light taxi.

Kel