10- New top quality brass thread in air / fuel bleeds with shoulder for Holley 2 and 4 barrel performance carburetors with 6-32 threads. Proper tuning of bleed circuits is critical for crisp throttle response and optimum power. NOTE: Bleeds have a .020" pilot hole-you must drill to your specs. also fits similar  AED, Avenger, BG, Demon, Grant, Street Avenger, QFT, etc. please see our ebay store listings for a complete selection of hard to find parts.