Now, all you need to do is rip out that stifling exhaust (and DPF while your at it) fit a s/steel 3" flow through pipe and then you'll get even more out of it! I just did the Navara 2.5 a few weeks ago and the whole 9 yards from chip (dyno settings) to tailpipe (no DPF anyway) and it ferkin has some balls! It's set on 5 for daily running, 7 for towing and 10......nah, it's too much for a dopey dual-cab. I leave it on 5 'cause it's under warranty and that's enough for me.
I had a Panther box on my V6TDI and it did no harm, more flat-line torque and I'd have to say improved fuel - great for towing. The thing you have to watch is let the whole thing cool down (turbo) before you get to your destination...chipped or not, don't flog the donk. TDI's need a sensible right foot, pedal-to-the metal occasionally and turbo warm down is a total must. No turbo timers for Tregs as we know!
