Mayor Isko Moreno has signed Ordinance No. 8772, which regulates the use of modified muffler/exhaust pipe on all types of motor vehicles.
ORDINANCE NO. 0644 - Regulating Modified Pipes and Mufflers PDF
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Vol. 1 No. 1 (2019): Ascendens Asia Singapore – Bestlink College of the Philippines Journal of Multidisciplinary Research Abstracts, Vol.1, No.1, March 2019
Chapter 1- 3
Use of firecrackers, open mufflers banned in Muntinlupa
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Use of firecrackers, open mufflers banned in Muntinlupa