1. LawStack
  2. Title 40 - Protection of Environment
  3. Chapter I - ENVIRONMENTAL PROTECTION AGENCY
  4. Subchapter C - AIR PROGRAMS
  5. Part 90 - CONTROL OF EMISSIONS FROM NONROAD SPARK-IGNITION ENGINES AT OR BELOW 19 KILOWATTS
  6. Subpart E - Gaseous Exhaust Test Procedures
  7. 40 CFR § 90.407
40 CFR § 90.407
Engine inlet and exhaust systems
June 9, 2020
CFR

(a) The engine manufacturer is liable for exhaust emission compliance over the full range of air inlet filter systems and exhaust muffler systems.

(b) The air inlet filter system and exhaust muffler system combination used on the test engine must be the systems expected to yield the highest emission levels.

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§ 90.406 Engine parameters to be measured and recorded
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§ 90.408 Pre-test procedures

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