DI is most beneficial when combined with turbocharging, but it can increase particulate emissions. New EPA Tier 3 emissions regs from 2017 will tighten limits on particulates, probably necessitating particulate filters on most DI engines.

Updated Chrysler Pentastar V6 Hints At Next-Gen Emissions Rules
Since its introduction in 2009, the Pentastar V6 lineup has been an enormous success for Fiat Chrysler Automobiles with more than 5 million units sold to date. The Pentastar in 3.6, 3.2 and 3.0-lit…