Regulations last checked for updates: Feb 06, 2026

Title 40 - Protection of Environment last revised: Dec 22, 2026
§ 1065.127 - Exhaust gas recirculation.

Use the exhaust gas recirculation (EGR) system installed with the engine or one that represents a typical in-use configuration. This includes any applicable EGR cooling devices.

source: 70 FR 40516, July 13, 2005, unless otherwise noted.
cite as: 40 CFR 1065.127