Milltek Resonated or Non-Resonated?

[ChrisGTL]

Going to spend some pennies on a new CAT back next week.

I currently run a 'mufflerectomy' on my TDI, which means a custom exhaust place cut the backbox out and replaced with a straight through pipe - sounds ok but it doesnt half drone at constant speeds (motorway)

Its enough of a pain to make me buy a Milltek, has anyone had any experiences of both resonated and non-resonated sytems on a TDI?

Views anyone?

[HDi fun]

Do you really get much performance benefit with the muffler removed? If you want to keep the noise down (I would want to do so) then go for the non-resonant box. There's little performance benefit of resonance tuned components in a turbocharged car as the turbocharger itself is very effective at damping the pressure pulses in the exhaust system anyway. Turbo's do obstruct exhaust systems, thus increaing back pressure - it's an unfortunate side effect of the way they work.

[pgarner]

its the resonated box that muffles the sound HDi.

i think a lot of the diesel owners go for the non- res one to try and mask some of the lumpy nosiey idle that the pd engines make

[HDi fun]

OK, I thought resonance was the noise. Thanks for correcting me. PDs can be lumpy at idle, although the v6 ones are a bit better in that respect.

[pgarner]

the resonated systems have a silencer in the centre pipe as well as the back box one.

no worries, makes a change for you correcting me