For 1966-1978 Big Twin with O-ring style intake manifold for stock bore and cam lifts up to .550 inches. Includes front and rear cylinder heads completely assembled with valve seats and guides, valves, valve springs, etc., ready to run, gaskets required for installation including cylinder base and head gaskets, rocker cover and exhaust port gaskets, rocker cover and exhaust pipe mounting hardware, and installation instructions. Sold as kit. Call 1-800-366-3464 for price.