Parts Catalogue › Manifold Stud - 53K487 Image 1 of 1 Manifold Stud - 53K487 $2.80 Manifold Stud - fits all A & B Series Engines5/16 UNF Thread both ends Quantity: Add To Cart Added! Manifold Stud - fits all A & B Series Engines5/16 UNF Thread both ends Reviews Reviewer Name Review Date Star Rating Description Posted on Etsy Product Show More