Most TDI Guys Claim less Smoke with more "efficient" intakes. No one that I know of reports improved MPG, although they (and I would) expect it.
Case in point 2000 NB TDI intake plugged down to 3/4" main inlet. Cleaned it out for the full 2" inlet and the smoke went down on hard accel, but MPG's were with in the tank to tank noise.
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2016 Tesla Model X
2022 Sprinter
Gone 2012 Tesla Model S P85
Gone 2013 Nissan LEAF SV
2012 Nissan LEAF SV
6 speed ALH TDI Swapped in to a 2003 Jetta Wagon
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