2.5" Power Valve Single Stage Standard Flow Specs: *Sold As a 2 Pack *Includes a High Quality Reusable Nylon Gasket & Factory Style Fiber Gasket *This Power Valve Has An Opening Vacuum of 2.5" Hg *Part # 125-25 *These Fit and Work with 2300, 4150, 4160 & 4500 Series Holley Carburetors and More !! *Also Fit and Work with Similar Style AED, Quick Fuel, Barry Grant, Street Avenger & Demon Style Carbs *These parts are Genuine Holley Parts *These Parts Will Come In Bulk Style Bag Packaging