Check the listing for details. HOLLEY CARBURETOR COMPLETE 50CC ACCELERATOR PUMP KIT. Condition: New. Listed at 39.95 USD. New complete accelerator pump kit for Holley 50cc type pump. Kit includes new housing & mounting screws, pump diaphragm, stainless steel pump spring, pump arm, mounting stud & clip, pump cam & screw For gasoline type carburetors. Will fit Holley 4150, 4160, 2300, all Avenger & HP. Also fits similar Barry Grant, Demon, QFT, Proform, AED, & many others. AVAILABLE UPGRADE: Complete kit with Alcohol compatible (gflt) diaphragm, add $7.00 - ($46.95) Manufactured from the highest quality materials. Combine items & save on shipping. Custom rebuild kits also available. The finest parts money can buy. Contact me for a quote. 25+ yrs. rebuilding & modifying Holley carbs. Hundreds of parts in stock. Anything you need, feel free to get in touch. Thanx for looking ! ! !