Quote:
Originally Posted by GreenTDI
Chiptuning could help reduce consumption with about 5%. Only if you don't make advantage of the extra power, that is. You could save even more if the EGR has been closed and the particulate filter has been deleted. But those things are not recommended (emission-wise)!
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Of course mine is old enough that it did not come with a particulate filter. I did remove the muffler and replaced it with a straight pipe. It is not loud. The turbo and catalytic converter seem to muffle exhaust noise just fine.