CR PRO THROTTLES AND KITS: Throttle features die-cast aluminum housing with black epoxy finish; chrome CR Pro throttle also available separately. Straight-pull assembly. Recommended for 34mm or smaller straight-pull carburetors. 41/2" throttle sleeve with grip retaining ring and pop-out end cap. Kit includes Motion Pro CR Pro throttle, throttle cable to work with stock throttle body. Designed for ultimate throttle performance.