Add that radical look to your engine with these velocity stacks. Velocity stack brackets feature our patented "Big Sucker" breather technology. Brackets made to work on stock EVO & Twin Cam Engines with CV carburetor, S&S 96 thru 107CI and 113CI engines with S&S Super E-carburetor, S&S 111 CI and 124 CI engines with S&S Super G carburetor. Two styles to choose from: 2" Smooth Stack and 90° Stack. All carved from billet aluminum with chrome or black finish.