As the title says....
2005 2.7 V6 Auto

Someone told me if I do, the exhaust would face down and if they're straight, I don't.
Mine are straight!

 

I think that's the other way round ?

Early 2.7's had down turned tailpipes and no DPF, later versions had straight pipes, like the petrol versions, and did have the DPF ?

 

it was explained to me it was facing down so that the dpf regen went into the floor rather than up into the air

 

hi
definately facing down no dpf, straight dpf fitted.

 

Unfortunately, that is incorrect.

 

The Diesel Particulate Filter (DPF) filters particulates out of the exhaust. Those sooty black particles in the exhaust. Before it was introduced, diesel exhausts had to point down so they didn't shoot all this rubbish at the cars behind. After the DPF, diesels were allowed to have straight back exhausts as the sooty stuff was now filtered out.

Hence down turned exhausts, no DPF, straight back exhausts, has DPF.