Turn Out 2-into-1 Exhaust System - BlackThe headpipe merges into a large 2 1 4" collector that steps up to a 2 1 2" core. Core is perforated and wrapped in a stainless steel screen, then enclosed in a fiberglass pillow. 4" muffler body capped with a 4" machined aluminum dual cut tip. Body can be rotated upward from its stock position. Works wtih stock or extended bags. Made in the U. S. A..