California Code of Regulations
Title 13 - Motor Vehicles
Division 2 - Department of the California Highway Patrol
Chapter 4 - Special Equipment
Article 9 - Exhaust System Noise Measurement
Section 1031 - Definitions
Current through Register 2024 Notice Reg. No. 38, September 20, 2024
The following definitions shall apply wherever the terms are used in this article:
(a) Exhaust System. An "exhaust system" consists of all pipes, converters, and chambers through which the exhaust gas flows from the engine exhaust manifold outlet flange to the end of the tailpipe.
(b) Maximum RPM. "Maximum rpm" for 1972 and later year model vehicles is the highest governed engine speed or, if ungoverned, the rpm at maximum engine net horsepower as determined by the engine manufacturer in accordance with SAE Standard J245 in the 1971, or any later, edition of the SAE Handbook. For earlier year models, "maximum rpm" is the highest governed engine speed or, if ungoverned, the rpm at maximum engine net or gross horsepower as specified by the vehicle manufacturer.
(c) Approved Laboratory. An "approved laboratory" has facilities and equipment for testing sound measuring equipment to American National Standards Institute Standard S 1.4-1971.
1. Amendment
of subsection (b) filed 8-20-81; effective thirtieth day thereafter (Register
81, No. 34).
2. Amendment filed 6-28-82; effective thirtieth day
thereafter (Register 82, No. 27).
Note: Authority cited: Section 27150.2, Vehicle Code. Reference: Sections 2500- 2504, 2540- 2549, and 27150.2, Vehicle Code.
