For motorcycle exhaust systems: Means that such product is compliant with the requirements of the United Nations Regulation ECE-R92 on Uniform provisions concerning the approval of non-original replacement exhaust silencing systems (RESS) for motorcycles, mopeds and three-wheeled vehicles.

For car exhaust systems: Means that such product is compliant with the requirements of the United Nations Regulation ECE-R59 on Uniform provisions concerning the approval of replacement silencing systems.

For motorcycle exhaust systems: Means that such product is compliant with the requirements of the United Nations Regulation ECE-R92 on Uniform provisions concerning the approval of non-original replacement exhaust silencing systems (RESS) for motorcycles, mopeds and three-wheeled vehicles.

For car exhaust systems: Means that such product is compliant with the requirements of the United Nations Regulation ECE-R59 on Uniform provisions concerning the approval of replacement silencing systems.