This carb kit is exclusive to Screamin Eagle. The CV (constant velocity) design creates smooth air/fuel delivery for exceptional low- and mid-range power. The big 44mm bore allows this carb to feed even the most air hungry engine at high rpms. Easy to install with stock cables. Screamin Eagle Intake Manifold P/N 29635-99 required for proper fitment on Twin Cam 88 equipped models. P/N 29636-99 required for Evolution 1340-equipped models and P/N 27643-00 required for XL models. The 44mm CV carburetor is not cruise-control compatible. For race application only. Fits 90-later Evolution 1340-equipped models and 99-later Twin Cam 88-equipped models, and 88-up XL models.