40 CFR 205.55-3 - Configuration identification.

Regulations last checked for updates: Dec 17, 2025

Title 40 - Protection of Environment last revised: Nov 17, 2028

§ 205.55-3 - Configuration identification.

(a) A separate vehicle configuration shall be determined by each combination of the following parameters:

(1) Exhaust system configuration. (i) Single vertical.

(ii) Dual vertical.

(iii) Single horizontal.

(iv) Dual horizontal.

(2) Air induction system (engine). (i) Natural.

(ii) Turbocharged.

(3) Fan. (i) Diameter.

(ii) Drive.

(a) Direct.

(b) Thermostatic.

(iii) Max fan rpm.

(4) Engine manufacturer's horsepower rating.

(5) Cab characteristic. (i) Sleeper.

(ii) Non sleeper.

(6) Category parameters listed in § 205.55-2.

authority: Secs. 6, 10, 11, 13, Pub. L. 92-574, 86 Stat. 1234 (42 U.S.C. 4905,4909,4910,4912

source: 41 FR 15544, Apr. 13, 1976, unless otherwise noted.

cite as: 40 CFR 205.55-3