Overview Reviews Product Description Holley 6-506 Carburetor Needle and Seat Assembly Performance Part Holley 6-506 Product Videos Custom Field Product Reviews Write a Review Write a Review × Holley Holley 6-506 Carburetor Needle and Seat Assembly Performance Part Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *