Hi-Output Slip-On Mufflers - Dark Chrome - 4-1/2" - 16468Designed specifically to address the needs of tuned motors built for high horsepower applications (high compression, large displacement, big cams). Every aspect is singularly focused to yield maximum horsepower by improving the volumetric efficiency of heavily modified engines as well as stock. Compatible with stock headpipes, Dresser Duals, Power Duals and CVO drop skirt bags. Sold in pairs. Made in the U. S. A..