6. Exhaust System Marking

What it is: Catalytic converters, DPFs (diesel particulate filters), and exhaust manifolds require identification for emissions compliance and anti-theft.

How lasers are used:

• High-contrast annealing marks on stainless steel exhaust components
• Marks must survive extreme temperatures (600–900°C) and corrosive environments
• Anti-theft identification on catalytic converters (growing requirement in many jurisdictions)