Want classic style and sound for your Metric Cruiser motorcycle? Look no further. These 4" Round Twin Slash Slip-On mufflers from Vance & Hines offer an all-mechanical straight-through louvered baffle, which boosts power and gives your bike a beefy, unmistakable sound.; ; This series of slip-on mufflers for touring models incorporates the best of Vance & Hines and redefines performance, looks and price with a distinctive style and unmistakable sound that is only available here Features a large 4" diameter muffler body with an all-mechanical straight through louvered baffle and new signature Twin Slash treatment