40 CFR § 205.173-2 - Tampering.

---
identifier: "/us/cfr/t40/s205.173-2"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 205.173-2 - Tampering."
title_number: 40
title_name: "Protection of Environment"
section_number: "205.173-2"
section_name: "Tampering."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "G"
subchapter_name: "NOISE ABATEMENT PROGRAMS"
part_number: "205"
part_name: "TRANSPORTATION EQUIPMENT NOISE EMISSION CONTROLS"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "Secs. 6, 10, 11, 13, Pub. L. 92-574, 86 Stat. 1234 (42 U.S.C. 4905, 4909, 4910, 4912)."
regulatory_source: "41 FR 15544, Apr. 13, 1976, unless otherwise noted."
cfr_part: "205"
---


# 205.173-2 Tampering.

The manufacturer must include the following statement pursuant to § 205.173-4 with each product of that category the manufacturer distributes into commerce:

****Tampering Prohibition

Federal law prohibits any modification to this exhaust system which causes the motorcycle to exceed the Federal noise standard. Use of the motorcycle with such a modified exhaust system is also prohibited.

Acts likely to constitute tampering include removal or puncturing the muffler, baffles, header pipes, or any other component which conducts exhaust gases.

[45 FR 86718, Dec. 31, 1980, as amended at 47 FR 57723, Dec. 28, 1982]