now they just need a way to mix the exhaust gases with air before exiting the tail pipe-- this way you don't have to put up with the smell.

 

Given Honda's new exhaust emission control system, that won't be necessary, since just about all the NOx will be removed by that electric filter and by the catalytic converter. The result is emissions that meet current EPA/CARB standards for even gasoline engines.

 

i thought it was the sulfurs that caused that