Effect of using a high performance-low pollution muffler (hplpm) with catalytic converter on fuel consumtion and performance of 110cc. JMEL : Journal of Mechanical Engineering Learning, [S. l.], v. 13, n. 1, p. 17–22, 2025. DOI: 10.15294/jmel.v13.i1.7934. Disponível em: https://journal.unnes.ac.id/journals/jmel/article/view/7934. Acesso em: 5 dec. 2025.