Both engines comply with stringent emission standards, including EU5 in Europe and LEV II / ULEV in the USA. Vehicles manufactured by Porsche demonstrate that even high-performance sportscars can achieve very low emission values in their respective category. In short, the Boxster is not only extremely sporty, it is also very clean.

This is achieved by means of a two-stage cascade-type catalytic converter which comprises two monolith substrates on each of the twin exhaust tracts. These specially coated substrates contain ultra-fine honeycomb channels in which pollutants are converted as exhaust gas passes through.

The stereo lambda control circuitry controls and monitors each cylinder bank separately, while another lambda sensor on each cylinder bank monitors pollutant conversion in the respective catalytic converter.*

* Not in markets with leaded fuel.