Originally Posted by MattWij
I had a 3" Turbo back Exhaust put on my 126kW Nav.
I got a pretty affordable one. I have an Auto so it was also a DPF delete. It made a noticeable improvement before I got an ECU remap a month later to properly deal with the DPF delete.
If you have a DPF that gets lost in the exhaust upgrade, you will likely need to do a ECU reflash. There are other ways around it but if you want it done properly a remap is the way to do it.
Mine is a 140KW STX, and being a manual version has no DPF. The pipe leading to the cat converter was cracked and a hole had burned through the converter. That's the first time the exhaust people has seen one do that.
Had the system for a few days now and there is a noticeable improvement in acceleration through the gears. Noise level is low - typical diesel I guess. I will be interested to see if it improves the fuel economy, but unlikely at the moment as I am enjoying the extra oomph!