Dart Pro 1 Aluminum Cylinder Head - Assembled - 64cc Chamber - 227cc Intake Runner - SB Chevy 327, 350, 400 - Angle Plug - 2.08", 1.60" Valves

Engine and Performance Recommendations for this cylinder head: Ultimate 23" Head, Maximum competition, Heads-Up & Super Classes over 7000 rpm, 400+ c. i. PRO 1 aluminum cylinder heads for small-block V8's deliver advanced airflow technology at an unbeatable price! There's a PRO 1 head for virtually every small-block engine. We offer a choice of four intake runner sizes (180cc, 200cc, 215cc, and 230cc), two chamber volumes (64cc and 72cc), five valve diameters, and straight or angled spark plugs. We've improved the original small-block design with extra-thick decks and high-capacity water jackets that increase reliability in high-performance applications. Hardened exhaust seats and long-lasting mag-bronze valve guides significantly extend cylinder head life. PRO 1 heads are engineered for easy installation. They use standard small-block pistons, headers, and valvetrain components, and are bolt-on replacements for most conventional 23° heads.