Edelbrock Performer EGR ManifoldEdelbrock part #3701 Performer EGR intake manifold is designed for street 1955 86 small block Chevys. This manifold accepts late model choke, water neck, air conditioning, alternator and H. E. I. Has provisions to add oil fill tube. Not for 1987 and later cast iron or Chevy Bowtie heads. Will fit 1987 and later stock aluminum heads. Warranty Installation Instructions Installation Instructions Accepts Exhaust Heated Chokes and Accepts EGR This Part