Stepped headers merge into a true reverse-cone megaphone muffler 1 3/4" headpipe steps up to 1 7/8" into the collector to increase flow and improve performance Removable spiral-core louvered baffle included 4" muffler body with billet end cap Includes mounting hardware Available in short 15 1/2" muffler lengths with chrome or black finish Heat shields included Includes 12mm and 18mm O2 port plugs Made in the U.S.A. SAATAVANA MELKEIN KAIKKIIN MALLEIHIN. ILMOITA PYÖRÄN MALLI KUN TILAATTE