Overview Reviews Product Description Carburetor - Ultra XP - 2-Barrel - 500 CFM - Holley Flange - No Choke - Dual Inlet - Aluminum - Black Anodized / Tumble Polished - Each Product Videos Custom Field Product Reviews Write a Review Write a Review × HOLLEY Ultra XP 4412 Carb 2BBL 500 CFM HLY0-4412BKX Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *