2-into-1 Exhaust System - 49-State - Chrome

1-3/4" headpipe steps up to 1-7/8" into the collector to increase flow and improve performance. 4" muffler body with billet end cap (24" long). Removable spiral-core louvered baffle included. Includes heat shields and mounting hardware. 12 mm and 18 mm O2 sensor ports. Made in the U.S.A..