Sierra 18-8506 Exhaust Elbow Mounting KitSierra high-quality engine parts are designed to meet OEM specifications. For Chrysler Small Block V8 318-360 cu. in.; For all models 1966 & up w/ swivel & fixed exhaust; Use With: 18-1913 Elbow; 18-1941 Manifold End Plate; 18-1945 Riser; 18-1946 Elbow; 18-6600 Elbow; 18-1940 Manifold; Interchangeable with: Barr; CM-20-6674JP; Mallory; 9-40376; Osco; 480-MK-FW;