Indeed. Noticed exactly the same with my D3 after fitting a decat

The extra performance was also an added bonus

My smoke test results:

Lost for Words wrote:

2013 (Previous owner): 0.95
2014 (EGRs starting to fail, IIRC): 1.27
2015 (EGRs blanked, de-cat, with two-stroke): 0.17

It's a coarse measure, but it should certainly be indicative of a significant reduction of particulates.

I saw a fair improvement in fuel consumption after blanking my EGRs (not surprisingly, because one was actually failing). Couldn't really judge after the de-cat because a new torque converter and turbo were also fitted at the same time!  Visiting from DISCO3.CO.UK
2006 Discovery 3 TDV6 Auto HSE Zambezi Silver