4″ reverse-cone megaphone muffler body with matching billet end cap
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
Features hand MIG welding
18 mm and 12 mm O2 ports with adapters and plugs
Includes mounting hardware and full heat shields
Made in the U.S.A.