Main Article Content
The addition of racing exhaust to a vehicle will greatly affect the quality of exhaust emissions. Racing exhausts that use the FreeFlow system which throws the remaining combustion gases out immediately without any deflection and catalyst in the racing exhaust. The addition of DB Killer uses nest-shaped copper material, besides reducing noise it also reduces excessive emissions and the material is easy to obtain, inexpensive, and has a simple manufacturing process. The advantage of DB Killer is that using a nest model copper plate catalyst material significantly reduces emissions compared to not using DB Killer. The DB Killer is installed at the end of a racing exhaust silencer and tested at different RPMs of 3500, 4500 and 5500. Tested using a gas analyzer to obtain CO, HC and CO2 values for racing exhaust emissions without DB Killer and using a copper DB Killer. Obtaining the results of reducing exhaust emissions is much better and produces less noise. The result is a lower exhaust emission value because there is a DB Killer made of copper at the end of the exhaust silencer which can withstand emissions in the DB Killer which has a hollow design.
This work is licensed under a Creative Commons Attribution 4.0 International License.
 RM. Bagus Irawan, P. Purwanto, “Optimum Design of Manganese-Coated Copper Catalytic Converter to Reduce Carbon Monoxide Emissions on Gasoline Motor”. Procedia Environmental sciences., vol. 23,pp.86-92, 2015.
 Andrey Pobedinsky, “Assessment of the influence of air temperature and cargo weight on fuel consumption and emissions of harmful substances with vehicle exhaust gases”. Transportation Research procedia., vol.63, 2022.
 Mark A Hoffman, Simona Onori, “A New Semi-Empirical Temperature Model for the Three Way Catalytic Converter”. IFAC-PapersOnLine., pp.48-15 (2015) 434-440.
 Martin Pechout, Petr Jindra, “Regulated and unregulated emissions and exhaust flow measurement of four in-use high performance motorcycles”. Atmospheric environment : X 14 (2022).
 O.A. Odunlami, O.K. Oderinde, “The effect of air-fuel ratio on tailpipe exhaust emission of motorcycles”. Fuel Communications., vol.11, 100040, 2022.
 Klemens Schürholz, Daniel Brückner, “Modeling of the Three-way Catalytic Converter by Recurrent Neural Networks”. IFAC PapersOnLine., pp.51-55 (2018) 742-747.
 Narayan Babu, Hsi-Hsien Yang, “VOCs emission characteristics in motorcycle exhaust with different emission control devices”. Atmospheric Pollution Research., vol.10,pp.1498-1506, 2019.
 Fiqhi Miftah, “Pengaruh penambahan katalik converter kawat nikel tembaga berbentuk saringan terhadap emisi gas buang motor supra x 125” Pendidikan Teknik otomotif., UNS., Indonesia, 2020.
 Maulana Imam, “Analis catalytic converter dengan bahan tembaga berbentuk sarang lebah terhadap emisi gas buang pada sepeda motor 125cc” Teknik Mesin., Univ Muhammadiyah Sumatera Utara., Indonesia, 2018.