ASE X1 Exhaust Systems Specialist [exhaust]

What is 'DPF delete' and why is it illegal for street use in the US?

Cleaning the DPF chemically; it is illegal because it voids the warranty Physically removing the DPF; it is illegal because it violates federal emissions laws Reprogramming the ECU to skip DPF monitoring; it is a grey area Replacing the DPF with a high-flow version; it is only illegal in California

Correct Answer:

Physically removing the DPF; it is illegal because it violates federal emissions laws

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