Vance & Hines Hi Output Slip Ons Black with Chrome End Caps 46759 Designed 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 Race quality black ceramic or chrome Compatible with Dresser duals, Power Duals and CVO drop skirt bags; 2-into-1 version also available for 10 models with 2-into-1 factory header Made in the USA