YUCHENSHLP Rams Horn Exhaust Manifolds Headers w/ 2.5" Center fits Most Stock Cylinder Heads With Round/Square Port Small Block Chevy SBC 283 305 327 350 400 Engines - SX-60016

• 1-3/8-inch by 1-3/8-inch square port design can be port matched to your heads Increased flow over stock manifolds and utilizes Corvette-style 2-1/2-inch 3-bolt collector Fits most Gen 1 small block Chevy heads with straight or angle plug design Includes fasteners, exhaust flange gaskets, and collector gaskets for installation Oval exhaust ports fit stock small block Chevy heads - will not clear angle plug heads. Please check the part number / model / make / year carefully before purchasing to insure fitment. YUCHENSHLP specializes in providing high-performance repair and replacement parts for various automobiles, we support 365 DAYS returns and exchanges. If you have any questions, please feel free to contact us, we will solve it for you as soon as possible, customer satisfaction is our unremitting pursuit.