"Coal rolling" now a subculture in CO.

[jmg8550]

Modern diesels with diesel particulate filters ( DPF's) don't smoke like that. That started in 2007. Now most diesel trucks also take Diesel exhaust fluid (DEF). I believe it's also federally mandated that all diesel engines having more than 25HP must have a DPF, and all Diesel engines over 75HP as of 2016 model year require DEF. this also includes all construction and farm equipment.

[redneck122]

Modern diesels with diesel particulate filters ( DPF's) don't smoke like that. That started in 2007. Now most diesel trucks also take Diesel exhaust fluid (DEF). I believe it's also federally mandated that all diesel engines having more than 25HP must have a DPF, and all Diesel engines over 75HP as of 2016 model year require DEF. this also includes all construction and farm equipment.

While this is true, DPF delete and a straight pipe exhaust is pretty standard as a first or second mod

[brutal]

Modern diesels with diesel particulate filters ( DPF's) don't smoke like that. That started in 2007. Now most diesel trucks also take Diesel exhaust fluid (DEF). I believe it's also federally mandated that all diesel engines having more than 25HP must have a DPF, and all Diesel engines over 75HP as of 2016 model year require DEF. this also includes all construction and farm equipment.

And most anyone outside the tri state testing immediately does a DPF delete...